The purpose of this publication is to provide comprehensive data on the climate
of
The assistance given by Mr. Robert S. Ingram, former Meteorologist in Charge,
National Weather Service Office,
At an elevation of about 1100 feet, the station is in a level or gently sloping
valley running east and west. The
The central floor of the
There are two separate rainfall seasons. The first occurs during the winter
months from November through March when the area is subjected to occasional
storms from the
The spring and fall months are generally dry, although precipitation in
substantial amounts has fallen occasionally during every month of the year.
During the winter months, the temperature is marginal for some types of crops.
Areas with milder temperatures around the edges of the valley are utilized by
these crops. However, the valley is subjected to occasional killing and hard
freezes in which no area escapes damage.
The valley floor, in general, is rather free of strong wind. During the spring
months southwest and west winds predominate and are associated with the passage
of low-pressure troughs. During the thunderstorm season in July and August,
there are often local, strong, gusty winds with considerable blowing dust.
These winds generally come from a northeasterly to southeasterly direction.
Throughout the year there are periods, often several days in length, in which
winds remain under 10 miles per hour.
Sunshine in
The autumn season, beginning during the latter part of September, is
characterized by sudden changes in temperature. The change from the heat of summer
to the mild winter temperatures usually occurs during October. The normal
temperature change from the beginning to the end of this month is the greatest
of any of the twelve months in central
By Harold Bulk, Office of Climatology,
The
climate of a location is the synthesis of several elements. The temporal variations of several of these elements is shown in the
graph on the following page.
The temperature of the air is probably the element that most people are aware
of. Yet air temperature is the result of many other climatic elements. The most
important is the receipt of solar energy, for solar energy is the force that
drives most of the other climatic elements. The daily amounts of solar energy
that are received at the top of the atmosphere (the extra-terrestrial
radiation, or ETR) is shown in curve A. The amounts
vary from nearly a thousand
Curve C represents the amount of energy that can reach
Some of the energy reaching the earth's surface is reflected back toward space
by the earth itself, some is used to evaporate water, and the remainder warms
the air. The large drop in energy receipt during July is directly traceable to
the increase in cloudiness (curve E) during this period. (The depletion of
solar energy due to clouds is also apparent during the winter months, although
less spectacularly so). The continued depression of the averaged receipts of
solar energy into August is due to the increased water vapor in the atmosphere
(curve F, from Reitan, 1960). The increased water
vapor in the atmosphere is due to a shift in the winds from a predominantly
westerly direction to a southerly direction, the so-called "Arizona
Monsoon". Although the dry bulb temperatures may be depressed during this
period, the "sensible temperatures" seem higher due to the increased
humidity of the air.
Also shown is the ten-year average daily precipitation at
Curve B is the average daily temperature at
Clearly, the daily average temperature at
Local Climatological Data, Monthly for
National Weather Service Forecast Office,
Reitan, C.H., 1960: "Distribution of Precipitable Water Vapor over the Continental United
States". Bulletin American Meteorological Society, 41, 79-87.
Rosendahl, H. 1976: "Table of daily Values of
Maximum Possible Solar Energy, in Solar Radiation and Sunshine Data for the
The
The warmest January occurred in 1986 when the mean monthly temperature was
61.4; the coldest was in 1937 with a mean temperature of only 43.2. The highest
temperature ever recorded in any January was 88 on the 19th in 1971. The lowest
January temperature (and the all-time low for
The relative humidity for the month averages about the same as that for
December. The low value in the afternoon averages around 33 percent.
The mean hourly surface wind speed is around 5.3 m.p.h.,
and the prevailing direction is from the east. The peak gust was 60 m.p.h. from the west on January 27, 1983.
Precipitation during the month normally totals 0.67 inches, but it has ranged
from 5.22 in 1993 to none in 1912, 1924, and 1972. The greatest amount of precipitation
in 24 hours was 1.84 inches which occurred on January 10-11, 1993. There are
normally four days with 0.01 inches or more, but January 1993 had fourteen such
days.
Snow can occur in January, but it is unusual. Snow in amounts of up to 1 inch
has been reported at the official observing station on seven January days since
1896. The heaviest falls of just 1 inch fell in 1933 and 1937. On January
20-21, 1937, amounts up to 4 inches fell in parts of the city and some remained
on the ground in shaded areas until the 23rd and 24th.
The mean monthly percentage of possible sunshine is 78 percent. The greatest
amount ever recorded was 100 percent in 1924, and the least was 54 percent in
1935.
There are normally 14 clear days, 7 partly cloudy days and 10 cloudy days in
the month. The greatest number of clear days was 27 in 1924 and 1925, while the
greatest number of cloudy days was 22 in 1957.
February begins the spring months where warm weather gradually returns to the
Desert Southwest. High temperatures slowly rise from a normal of 68 at the
beginning of the month to 73 at the end of the month, and nighttime
temperatures moderate from 43 to 46. Nevertheless, a nighttime freeze is still
a threat in February and into early March. Freezing temperatures can be
expected on 3 or 4 nights during February across the valley.
Temperatures in the 90s can occur in February, but such occurrences are
unusual. The highest ever was 92 on the 25th in 1921 and on the 27th in 1986,
and dropped as low as 24 on the 7th in 1899 and on the 8th in 1933. The coldest
February on record was in 1939 with a mean temperature of 48.6 and the warmest
was 66.0 in 1991.
The normal rainfall for the month is 0.68 inches, and usually there are four
days with 0.01 inches or more of rain. The month can be counted on to have at
least one day with a thunderstorm, but in 1931 there were five days with
thunderstorms. As much as 4.64 inches of rain have been measured in February
back in 1905 and none fell in 1912, 1967, and 1984. There was 0.5 inches of
snow on February 2, 1939, and a trace on three other days of the same month. A
trace also fell on three consecutive days in February 1985 and a trace in 1994.
There are usually 13 clear days, 7 partly cloudy days, and 9 cloudy days with
an expectancy of 80 percent sunshine during the month.
In March temperatures begin to warm noticeably. The average daily high
temperature rises from 73 to 79 during the month and temperatures above 85 are
not uncommon in the last days. At the same time, average daily low temperatures
rise from 47 to 52. However, it should be remembered that even by the end of
the month there is still a 20-percent chance of a 32 degree temperature in the
coldest sections of the valley.
The normal mean temperature for the month is 62.2. The warmest March on record
occurred in 1972 when the average temperature was 70.6, and the coldest
occurred in 1897 with 54.3 degrees. The highest temperature ever recorded on a
March day was 100 on the 26th in 1988. The lowest temperature was 25 on the 4th
in 1966. Some March days can still be cold, and a high temperature of only 49
was observed on the 2nd in 1915. At the other extreme, the temperature did not
fall below 74 on the 28th in 1986. This is warm even for early summer.
Rainfall, during March, averages 0.88 inches. As much as 4.82 inches was
measured in 1941, and none was recorded in 1933, 1956, 1959, and 1984. Four
days with measurable rain can be expected during the month, but in 1905 there
were twelve such days.
Snow has been observed only four times since 1896. Two-tenths of an inch fell
on the 12th in 1917, and a trace fell on the 3rd in 1976, and on the 21st and
27th in 1991.
The month averages 9 cloudy days but has had as many as 15 in 1966. There was
only 1 cloudy day in 1917 and 1988. Although not especially a sunny month,
March still averages about 84 percent of possible sunshine. In 1988, there was
99 percent sunshine, and in 1935 there was a little as 60 percent.
Elsewhere in the nation, April is greeted generally as the first month of
spring:
"April and May are the keys of the
year".
"April showers bring May flowers", etc.
But in
The mean temperature for the month is 69.9, and it has been as warm as 80.1 in
1989 and as cold as 62.4 in 1967.
April's rainfall continues the downward trend toward the May minimum, and the
normal is only 0.22 inches. In 1926, 3.36 inches fell, and the last April
without any rain was in 1993. Over the years, however, the month averages two
days with measurable rain. The most measurable rain days occurred in 1926 with
13.
Winds become a bit more gusty in April with the increase in heating, and gusts
on the order of 20 to 24 m.p.h. or higher can be
expected on eight days and even gusts of 40 to 44 m.p.h. on one day.
April's sunshine averages 89 percent of possible, reaching a high value of 98
percent in 1954, 1961, 1989, and 1991, and a low of 68 percent in 1926.
Six cloudy days can be expected, but there were as many as twelve in 1959. The
last April with no cloudy days occurred in 1920.
James Russell Lowell said in Under the Willows, "May is a pious
fraud of the almanac". In
The average date of the first 100-degree temperature is May 14th. Such a
temperature reading has been observed only once as late as June 18th in 1913,
and 100-degree temperatures are not spring-like!
The average high temperature is 93.6, and the average low temperature is 63.9.
The temperature has reached as high as 114 on the 30th in 1910 and has dipped
as low as 39 on the 3rd in 1899. Fortunately, these are rare exceptions.
May signals the beginning of the dry season. The month
averages only 0.12 inches of rain and is the driest month of the year. The most
rain ever recorded in May was 1.31 inches in 1930. The month averages only one
day with 0.01 inches or more of rain, and it has had as many as seven such
days, but no more. This happened in 1992. In contrast, there were 14 rainy days
in February 1905. Thunderstorms occur on the average of once a month, but few
can be seen in the distance on about three other days in the month.
Cloudy days are unusual and occur on only about four days. Sunshine on the
average reaches the 93 percent level. Never has any May had less than 79
percent of possible sunshine, which was in 1992.
At the same time, May humidities, like June, are
generally extremely low in comparison with those of July and August. Perhaps
May should be appreciated more than it is because it is nature's way of
conditioning residents for the steamy summer season of higher temperatures and humidities.
June is the 2nd driest and one of the three hottest months of the year. The
normal rainfall amounts to only 0.13 inches, but as much as 1.70 inches was
measured in 1972. There is usually only one day when 0.01 inches or more of
rain falls, and the greatest number of such days was only four. This happened
only twice, in 1899 and 1932.
The normal mean temperature for the month is 88.2 and has ranged from 93.8 in
1990 down to 79.0 in 1965. In early June, the normal daily high temperature
reaches 100 or higher and stays there until the middle of September. Average
nighttime temperatures rise from 68 on the 1st to 78 on the 30th. However, on
the 27th in 1990, the temperature did not fall any lower than 93. The month
averages three days of 110 degrees or higher, but in 1974 there were eighteen
such days. The highest temperature ever recorded at
Despite the increasing heat, the air is very dry with the relative humidity
even slightly lower than that of May and the lowest of the year. Afternoon
readings on the average dip as low as 11 percent. Sunshine is at its maximum
and averages 94 percent. June 1916, 1917, 1928, and 1939 all had 100 percent
sunshine. The lowest ever recorded was 78 percent in 1931. There are usually
only two cloudy days, and the most that has ever been observed was six in 1956.
Toward the end of June, more thunderstorms become visible in the distance along
the mountains heralding the arrival of the annual
July is the month in which the
The monsoon season generally begins in early July and extends through the
middle of September; however, it began as early as June 16th in 1925 and as
late as July 25th in 1987. The monsoon is not necessarily a
permanent feature but may come and go, giving residents brief respites
from the muggy weather. On the average there are about 20 monsoon days in July,
but there were as many as 31 days in 1984 and as few as seven days in 1987.
Increased thunderstorm activity accompanies the arrival of the monsoon.
Thunderstorms are visible on the average during 25 days of the month. On six or
seven of these days, the storms are close enough for thunder to be heard at
With the increase in thunderstorm activity comes an
increase in rainfall. The average for the month is 0.83 inches, but 6.47 inches
fell in 1911. The month averages four days with 0.01 inches or more of rain but
has had as many as thirteen days in 1896. The probability of a trace or more of
rain on any particular day rises from 21 percent on the first of the month to a
peak of 54 percent during the last ten days as the monsoon influence
intensifies. July is the windiest month of the year with an average velocity of 7.1 m.p.h.
July's average temperature of 93.5 degrees is the highest of the year, and the
month features an average high temperature of 105.9 and an average low of 81.0.
The temperature has reached as high as 121 on the 28th in 1995. The lowest ever
recorded was 63 on the 4th and 5th in 1912. There are usually 26 days with 100
or higher and five days with 110 or higher during the month. In 1989, there
were 16 days with 110 or higher. Nighttime temperatures generally fall to
around 80, however, it did not fall below 93 on the
20th in 1989.
By August the summer heat begins to moderate slightly, but humidities
are higher than in July. This makes many residents feel that it is much hotter
than it really is. Actually, the average high temperature is 103.7 or 2.2
degrees lower than in July.
August still averages 23 days with temperatures of 100 or higher and 2 days of
110 or higher. It has had as many as 31 days of 100 or higher in 1973 and 1975
and in several earlier years. There were as few as 9 such days in 1955. In
1995, there were 10 consecutive days of 110 or higher.
Rainfall in August averages 0.96 inches, the second highest
of any month of the year. The most rain ever recorded in August was 5.33
in 1951 and the least was a trace in 1973 and 1975. July is the only other
month that always has had some rain.
Thunderstorms and "dusters" are most frequent in August with an
average of 7 thunderstorm days, and thunderstorms clouds are usually visible on
24 days of the month.
Sunshine averages 85 percent during the month, but there are usually 4 cloudy
days. In 1957 there were 10 cloudy days, and in 1953 and several other years
there were none.
September usually signals the end of the monsoon season. Although the long
sustained periods of high humidity that occur principally in July and August
may have ended, periods of high humidity do still occur in September. Twelve
days in the month can usually be classified as monsoon days.
The average monthly temperature is 85.6 or 7.9 degrees lower than that of July.
On the 1st of the month the average high is 102 and the low 77; by the 30th the
average high is down to 94 and the low 68.
Rainfall averages 0.86 inches. The most ever recorded was 5.41 inches in 1939,
and the least was none in 1953, 1957, 1968, 1973, and 1988. The month averages
three days with 0.01 inches or more, but in 1939 there were nine such days.
There are usually four days with thunderstorms and nine other days when
thunderstorms are visible over the surrounding mountains.
The rainfall patterns change in September from the evening thundershower
pattern of the monsoon season to a more generally distributed pattern more
typical of the winter months.
There are usually three cloudy days, which next to June's two days, make it one of the least cloudy months of the year.
Sunshine averages 89 percent of possible.
During the month of October, weather is generated more from storm activity over
the
The average temperature for the month is 74.5 or 19.0 degrees cooler than July.
Daytime high temperatures usually begin the month at 94 but cool off to 82 by
Halloween. Nighttime low temperatures drop from 67 to 54. These are the
largest changes in normal high and low temperatures that occur during any month
of the year. Record temperature extremes for the month range from 107 in 1980
to 34 in 1971. October does average one day each year with at least 100 or
higher. The latest in the season that a temperature of 100 or higher has ever
occurred was October 20, 1921.
Rainfall amounts to only 0.65 inches on the average. Rain falls more evenly
during the 24 hours in contrast to the summer months when it is concentrated
during the night.
The most rain that ever fell since records began was 4.40 inches in 1972. There
is usually one thunderstorm day during the month.
The month averages four cloudy days. It averages 88 percent of possible
sunshine and has never had less than 65 percent.
On the whole, October is a magnificent month with enough of the summer warmth
to make outdoor living the most enjoyable of the year and yet with enough
coolness to make it invigorating.
With November usually comes the first 32 degree temperatures or below in the
valley. Although the average date of such occurrence is December 12th at
November 21 in Buckeye
22 in
23 in
...............24 in
...............25 in
The average temperature for the month is 61.9. Daytime high temperatures at the
beginning of the month usually are about 81 and nighttime lows are normally 54.
By the end of the month these temperatures have dropped to 70 and 44,
respectively. The highest reading was a 96 on the 1st and 2nd in 1924, and the
lowest was 27 on the 23rd in 1931.
By November the area is definitely under the influence of weather systems of
more northern latitudes, and rainfall averages 0.66 inches. The most rainfall
ever recorded was 3.61 inches in 1905, and the last time that no rain fell
during the month was in 1980.
Snow has been observed only once since 1896. One-tenth of an inch was measured
on the 28th in 1919.
Sunshine averages 83 percent of possible. However, there has been as much as 98
percent reported in 1948 and 1956 and as little as 62 percent in 1965 and 1982.
On the average there are 18 clear days, 6 partly cloudy days, and 6 cloudy
days.
The average wind velocity for the month is 5.3 m.p.h.,
and the strongest peak gust ever recorded was 60 m.p.h. on the 30th in 1982.
Unlike other sections of the Nation, this month is not the melancholy time that
precedes the depressing winter months, but rather it
is an invigorating month of sparkling days and cool nights.
By December, freezing temperatures in the valley are rather common, and
freezing temperatures can be expected somewhere in the area on fifteen to
twenty days of the month.
High daytime temperatures on the first of the month are about 69 and taper off
slowly to 65 by the end of the month. Nighttime temperatures drop from 44 to
40. The highest temperature ever recorded was 87 on the 10th in 1950, and the
lowest was 22 on the 31st in 1900 and on the 26th in 1911.
Total rainfall for the month averages 1.00 inch and is the highest of any month
of the year. There are usually four days with 0.01 inches or more. Pacific
storm systems move a little farther south, bringing more moisture to replenish
the water supply with snows in the mountains. The most rain recorded was 3.98
inches in 1967, and the least was none in 1900, 1901, 1917, 1958, 1973, and
1981.
A trace of snow has been reported on eight December days since 1896; 0.1 inches
fell on the 11th in 1985, and 0.2 inches on both the 21st and 22nd in 1990.
Sunshine now averages 77 percent with nine cloudy days. There was 98 percent of possible observed in 1958 and as little as
47 percent in 1914.
Station |
County |
Data Began |
|
Apache |
December 1, 1851 |
|
|
December 1856 |
|
Mohave |
June 1859 |
|
Graham |
December 1, 1860 |
|
Graham |
August 1864 |
|
Yavapai |
January 1865 |
|
Maricopa |
September 1, 1866 |
|
Cochise |
November 1866 |
Camp Date Creek |
Yavapai |
January 1867 |
|
Cochise |
August 1, 1867 |
|
Mohave |
November 1867 |
|
Gila |
February 1, 1868 |
|
Yavapai |
February 1, 1868 |
|
Yavapai |
December 1869 |
|
|
January 1, 1870 |
ELEVATION OF AIRPORT |
1128 Feet |
ELEVATION OF IVORY TIP OF BAROMETER |
1109.31 |
ELEVATION OF STATION PRESSURE |
1107 |
ELEVATION OF GROUND AT HYGROTHERMOMETER |
1110 |
ELEVATION OF GROUND AT WIND VANE AND ANEMOMETER |
1110 |
ELEVATION OF CLIMATOLOGICAL STATION |
1107 |
ELEVATION OF GROUND AT OFFICE |
1106 |
ELEVATION OF HYGROTHERMOMETER |
Above Ground, 5 |
ELEVATION OF WIND VANE AND ANEMOMETER |
Above Ground, 33 |
ELEVATION OF SUNSHINE SWITCH |
Above Ground, 7 |
ELEVATION OF PYRANOMETER |
Above Ground, 6 |
ELEVATION OF RAIN GAGE |
Above Ground, 5 |
Month |
MAXIMUM |
MINIMUM |
MEAN |
January |
65.9 |
41.2 |
53.6 |
February |
70.7 |
44.7 |
57.7 |
March |
75.5 |
48.8 |
62.2 |
April |
84.5 |
55.3 |
69.9 |
May |
93.6 |
63.9 |
78.8 |
June |
103.5 |
72.9 |
88.2 |
July |
105.9 |
81.0 |
93.5 |
August |
103.7 |
79.2 |
91.5 |
September |
98.3 |
72.8 |
85.6 |
October |
88.1 |
60.8 |
74.5 |
November |
74.9 |
48.9 |
61.9 |
December |
66.2 |
41.8 |
54.1 |
Annual |
85.9 |
59.3 |
72.6 |
Month |
MAXIMUM |
MINIMUM |
MEAN |
January |
67.3 |
44.8 |
56.1 |
February |
71.4 |
48.4 |
59.9 |
March |
76.1 |
53.0 |
64.5 |
April |
84.7 |
57.6 |
71.1 |
May |
93.9 |
67.4 |
80.6 |
June |
103.9 |
75.6 |
89.8 |
July |
106.6 |
82.9 |
94.7 |
August |
104.5 |
81.6 |
93.0 |
September |
99.0 |
75.6 |
87.3 |
October |
87.7 |
62.1 |
74.9 |
November |
75.0 |
50.4 |
62.7 |
December |
67.1 |
43.9 |
55.5 |
Annual |
86.4 |
61.9 |
74.2 |
Month |
HIGHEST |
YEAR |
LOWEST |
YEAR |
January |
62.0 |
2003 |
43.2 |
1937 |
February |
66.0 |
1991 |
48.6 |
1939 |
March |
72.3 |
2004 |
54.3 |
1897 |
April |
80.1 |
1989 |
62.4 |
1967 |
May |
87.0 |
1984 |
69.0 |
1917 |
June |
94.6 |
2006 |
79.0 |
1965 |
July |
97.7 |
2003 |
85.4 |
1912 |
August |
96.2 |
2007 |
84.6 |
1918 |
September |
92.2 |
2001 |
78.9 |
1900, 1912 |
October |
82.7 |
2003 |
66.2 |
1916 |
November |
70.0 |
2007 |
55.0 |
1922 |
December |
61.3 |
1980 |
46.6 |
1911 |
Annual |
77.0 |
1989 |
67.8 |
1964 |
|
MEAN MAXIMUM |
|
|
|
|
MEAN MINIMUM |
|||
|
HIGHEST |
YEAR |
LOWEST |
YEAR |
|
HIGHEST |
YEAR |
LOWEST |
YEAR |
January |
74.6 |
2003 |
53.5 |
1949 |
|
49.8 |
1993 |
31.9 |
1937 |
February |
78.7 |
1991 |
60.5 |
1939 |
|
53.2 |
1991 |
33.4 |
1964 |
March |
86.7 |
1972 |
67.3 |
1897 |
|
59.5 |
2004 |
40.3 |
1917 |
April |
94.2 |
1989 |
75.1 |
1900 |
|
65.9 |
1989 |
47.5 |
1967 |
May |
101.2 |
1984 |
83.7 |
1917 |
|
73.7 |
1997 |
54.2 |
1917 |
June |
108.6 |
1974 |
96.0 |
1967 |
|
81.8 |
2006 |
60.6 |
1965 |
July |
109.8 |
1989 |
97.7 |
1912 |
|
86.6 |
2003 |
73.1 |
1912 |
August |
107.3 |
1962 |
97.0 |
1955 |
|
86.1 |
2007 |
71.3 |
1900 |
September |
104.6 |
2001 |
93.6 |
1900 |
|
80.6 |
1983 |
63.6 |
1912 |
October |
95.8 |
1952 |
80.7 |
1919 |
|
70.8 |
2003 |
50.8 |
1923 |
November |
82.3 |
1949 |
67.4 |
2000 |
|
58.3 |
2007 |
37.3 |
1916 |
December |
74.9 |
1980 |
59.2 |
1909 |
|
48.2 |
1977 |
32.6 |
1916 |
Annual |
89.8 |
1989 |
81.4 |
1913 |
|
64.9 |
2003 |
53.1 |
1917 |
|
HIGHEST |
|
|
LOWEST |
||
|
MAXIMUM |
DAY |
YEAR |
MINIMUM |
DAY |
YEAR |
January |
88 |
19 |
1971 |
16 |
7 |
1913 |
February |
92 |
25 |
1921 |
24 |
7 |
1899 |
March |
100 |
26 |
1988 |
25 |
4 |
1966 |
April |
105 |
20 |
1989 |
35 |
10 |
1922 |
May |
114 |
30 |
1910 |
39 |
3 |
1899 |
June |
122 |
26 |
1990 |
49 |
4 |
1908 |
July |
121 |
28 |
1995 |
63 |
4 |
1912 |
August |
116 |
1 |
1972 |
58 |
20 |
1917 |
September |
116 |
1 |
1950 |
47 |
22 |
1895 |
October |
107 |
1 |
1980 |
34 |
30 |
1971 |
November |
96 |
1 |
1924 |
27 |
23 |
1931 |
December |
87 |
10 |
1950 |
22 |
31 |
1900 |
Annual |
122 |
JUN 26 |
1990 |
16 |
JAN 7 |
1913 |
|
LOWEST |
|
|
|
HIGHEST |
||
|
MAXIMUM |
DAY |
YEAR |
|
MINIMUM |
DAY |
YEAR |
January |
39 |
6 |
1913 |
|
61 |
27 |
1988 |
February |
46 |
6 |
1899 |
|
65 |
21 |
1996 |
March |
49 |
2 |
1915 |
|
74 |
28 |
1986 |
April |
52 |
1 |
1949 |
|
77 |
27 |
1987 |
May |
54 |
1 |
1915 |
|
86 |
29 |
1983 |
June |
68 |
2 |
1899 |
|
93 |
27 |
1990 |
July |
79 |
1 |
1911 |
|
96 |
15 |
2003 |
August |
73 |
27 |
1951 |
|
95 |
12 |
2003 |
September |
66 |
23 |
1895 |
|
90 |
3 1 |
1982 2007 |
October |
56 |
30 |
1959 |
|
83 |
2 |
1997 |
November |
40 |
28 |
1919 |
|
73 |
4 |
2001 |
December |
36 |
10 |
1898 |
|
65 |
3 |
1986 |
Annual |
36 |
DEC 10 |
1898 |
|
93 |
JUN 27 |
1990 |
|
GREATEST |
|
LEAST |
|
|
RANGE |
YEAR |
RANGE |
YEAR |
January |
69 |
1971 |
33 |
1995 |
February |
61 |
1921 |
31 |
1993 |
March |
67 |
1966 |
35 |
1980 |
April |
62 |
1949 |
44 |
1931 |
May |
66 |
1910 |
40 |
1981 |
June |
63 |
1929 |
38 |
1986 |
July |
50 |
1905 |
33 |
1959 |
August |
51 |
1918 |
31 |
1955 |
September |
58 |
1945 |
35 |
1981 |
October |
66 |
1917 |
33 |
1983 |
November |
67 |
1931 |
38 |
1986 |
December |
58 |
1911 |
35 |
1992 |
Annual |
96 |
1990 |
77 |
1984 |
HOTTEST |
Year |
COOLEST |
Year |
93.4 |
1981 |
84.1 |
1912 |
93.3 |
1989 |
84.2 |
1913 |
92.7 |
1988 |
84.4 |
1923 |
92.1 |
1994 |
84.6 |
1965 |
92.0 |
1977 |
85.1 |
1964 |
|
HOTTEST THREE |
|
|
HOTTEST TWO |
Temp |
(Combination) |
|
Temp |
(Combination) |
94.8 |
June, July, August 1981 |
|
95.6 |
July, August 1989 |
94.4 |
June, July, August 1988 |
|
95.5 |
July, August 1981 |
94.4 |
June, July, August 1989 |
|
95.1 |
July, August 1988 |
93.9 |
June, July, August 1985 |
|
94.8 |
July, August 1991 |
93.8 |
June, July, August 1994 |
|
94.7 |
July, August 1985 |
93.5 |
June, July, August 1977 |
|
94.6 |
July, August 1977 |
93.2 |
June, July, August 1986 |
|
94.6 |
July, August 1994 |
Temperature |
Month |
Year |
97.4 |
July |
1989 |
96.2 |
July |
1988 |
95.8 |
August |
1981 |
95.6 |
July |
1980 |
95.5 |
July |
1983 |
95.3 |
August |
1994 |
WARMEST |
Year |
|
COLDEST |
Year |
60.6 |
1980-1981 |
|
49.3 |
1963-1964 |
59.4 |
1985-1986 |
|
49.8 |
1948-1949 |
58.6 |
1991-1992 |
|
50.0 |
1916-1917 |
58.5 |
1990-1991 |
|
52.2 |
1945-1946 |
|
COLDEST TWO |
|
|
COLDEST MONTH |
|
48.0 |
January, February |
1964 |
|
43.2 |
January 1937 |
48.2 |
December, January |
1936-1937 |
|
44.6 |
January 1949 |
48.3 |
December, January |
1948-1949 |
|
46.6 |
December 1911 |
48.4 |
December, January |
1931-1932 |
|
47.0 |
January 1932 |
48.7 |
January, February |
1949 |
|
47.1 |
December 1916 |
Dew Point (F) |
Month |
Day |
Year |
79 |
July |
19 |
1957 |
78 |
August |
9 |
1977 |
78 |
August |
20 |
1978 |
77 |
August |
1 |
1951 |
76 |
July |
10 |
1899 |
76 |
August |
10 |
1913 |
76 |
August |
4 |
1943 |
76 |
July |
31 |
1945 |
76 |
July |
17 |
1953 |
76 |
July |
22 |
1966 |
76 |
August |
19 |
1966 |
Dew Point (F) |
Month |
Day |
Year |
74 |
August |
4 |
1943 |
73 |
August |
19 |
1966 |
Dew Point (F) |
Month |
Year |
68 |
August |
1955 |
67 |
August |
1943 |
Dew Point (F) |
Month |
Day |
Year |
-23 |
November |
28 |
1976 |
-22 |
December |
21 |
1977 |
-15 |
January |
29 |
1970 |
-14 |
February |
2 |
1972 |
-13 |
Februrary |
3 |
1972 |
-13 |
April |
13 |
1974 |
-12 |
March |
10 |
1977 |
-11 |
February |
4 |
1972 |
Dew Point (F) |
Month |
Day |
Year |
-10 |
December |
21 |
1977 |
-5 |
February |
3 |
1972 |
Dew Point (F) |
Month |
Year |
20 |
February |
1972 |
21 |
March |
1977 |
Relative Humidity (%) |
Month |
Day |
Year |
2 |
May |
8 |
1904 |
2 |
May |
16 |
1907 |
2 |
May |
13 |
1976 |
2 |
December |
21 |
1977 |
2 |
April |
21 |
1979 |
2 |
June |
4 |
1982 |
TEMPERATURE |
DEW POINT |
HUMIDITY |
HEAT INDEX |
100 |
75 |
45 |
112 |
101 |
74 |
43 |
112 |
102 |
69 |
35 |
110 |
103 |
69 |
34 |
110 |
104 |
68 |
32 |
111 |
105 |
69 |
32 |
113 |
106 |
67 |
29 |
112 |
107 |
66 |
27 |
112 |
108 |
68 |
28 |
116 |
109 |
66 |
26 |
116 |
110 |
62 |
22 |
113 |
111 |
63 |
22 |
116 |
112 |
59 |
18 |
113 |
113 |
59 |
18 |
115 |
114 |
57 |
16 |
114 |
115 |
56 |
15 |
115 |
116 |
56 |
15 |
117 |
117 |
56 |
14 |
117 |
118 |
56 |
14 |
118 |
5-Year Interval |
Temperature |
Relative Humidity |
1896-1900 |
69.8 |
38 |
1901-1905 |
70.1 |
39 |
1906-1910 |
69.7 |
44 |
1911-1915 |
68.9 |
44 |
1916-1920 |
68.9 |
48 |
1921-1925 |
70.2 |
44 |
1926-1930 |
70.9 |
41 |
1931-1935 |
71.8 |
40 |
1956-1960 |
71.3 |
40 |
1936-1940 |
71.9 |
47 |
1941-1945 |
70.5 |
41 |
1946-1950 |
71.3 |
43 |
1951-1955 |
71.0 |
41 |
1961-1965 |
69.6 |
38 |
1966-1970 |
70.7 |
40 |
1971-1975 |
71.8 |
35 |
1976-1980 |
73.5 |
46 |
1981-1985 |
74.3 |
39 |
1986-1990 |
75.8 |
34 |
1991-1995 |
74.6 |
37 |