Climate of Arizona
Arizona’s climate is arid and semi-arid, with average annual precipitation ranging from 3 inches in the southwest at Yuma to around 40 inches in the White Mountains in east central Arizona.
The southwestern desert is hot, with winter daytime temperatures in the lower 60s and summer daytime temperatures between 105° and 115° F. Nighttime temperatures on the desert drop slightly below freezing in the winter, while elsewhere in the state, winter nights frequently drop into the 20s.
Arizona State Climate Summary
Click on this link to see the latest NOAA NCEI state climate summary
Regional Climate Centers
Western Regional
Southern Regional
High Plains Regional
Midwestern Regional
Southeast Regional
Northeast Regional
Regional Integrated Sciences and Assessments
Southwest RISA
West RISA
Pacific RISA
Western Water RISA
South Central RISA
Southwest U.S. Station Climate Summaries
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Climate History
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Arizona Facts
Notable Storms in the 20th Century
Tropical Cyclones in Arizona
Historic Extreme Temperatures in Phoenix and Yuma
Historic First/Last Days Temperature Thresholds in Phoenix and Yuma
Annual and Monthly Records Phoenix
Annual and Monthly Records Yuma
Phoenix Snowfall History
Phoenix NWS Watch/Warning Criteria
Phoenix NWS Storm Event Summaries