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ASU School of Geographical Sciences ASU Climatology

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OFFICE OF THE ARIZONA STATE CLIMATOLOGIST

Welcome to the web page for the Office of the Arizona State Climatologist. The primary goal of the office is to provide information regarding the state’s climate in support of operational, educational, planning, and research endeavors. Below is an introduction to the office, climate data, and information for Arizona and the southwestern United States, and guidelines for requesting additional information or data. There are many excellent sources for climate information associated with the State of Arizona and the southwestern United States. If you can not find what you are looking for here, we have suggested other sources as promising alternatives.

 

April is Water Awareness Month - click the link for more information.

Weather Information

Climate Information

Monthly State Temperature & Precipitation Update

Drought Information

Other Resources

About the Office

2008 MONSOON PAGE

Phoenix Raindays 2005-2009

Rainlog – Arizona Rain Network

Arizona March Climate Summary

Download Climate Calendars

World Climate Records

Climate of Phoenix

Below are Departure from Normal Maps – since January 1st, 2009, updated 4/21/2009.

Link to Other Climate Maps from Western Region Climate Center

Precipitation (click image to access most recent map) Temperature

East Mesa reported 99oF on Sunday, and the lower Colorado River is expected to reach 100oF today, and Phoenix may reach 100oF on Tuesday. That will not be a record, as the record for May 21st in Phoenix is 103oF, set in 1989. The earliest 100oF day in Phoenix was March 26, 1988, the first 100oF day in 2007 was April 28th, and the first +100oF day of 2008 was May 18th.

 

Data through 4/19/2009

 

Winter 2008-09

Summer-2008

 

40o or lower

32o or lower

100o or higher

110o or higher

City

First Day

# Days

First Day

# Days

First Day

#` Days

First Day

#` Days

Phoenix

Dec 20

8

 

 

May 18

106

May 19

22

Tucson

Oct 13

51

Dec 21

6

May 19

49

May 21

1

Yuma

Dec 18

7

 

 

Apr 14

122

May 18

25

Flagstaff (90o / 100o)

Sep 4

211

Oct 6

174

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Prescott (90o / 100o)

Oct 12

158

Oct 12

114

May 19

55

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Winslow (90o / 100o)

Oct 6

175

Oct 12

139

May 18

72

Jun 15

7

Last measurable precipitation in Phoenix April 11, 2009 – 9 days ago.

Last measurable precipitation in Tucson April 11, 2009 – 9 days ago.

Last measurable precipitation in Flagstaff April 16, 2009 – 4 days ago

 

Coldest temperature reported in the state this winter was -19oF at Grand Canyon Airport on Dec. 27, 2008.

Flagstaff had a low of -6oF on Saturday morning, Dec. 27, 2008, their lowest temperature so far this winter.

The first snowfall reported for the winter of 2008-09 was 1.3” at Bellemont near Flagstaff on Sunday Nov. 9, 2008

The last 100oF day in Arizona was Oct. 27, 2008 at Parker

2007-2009 Office of the Arizona State Climatologist

 

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