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

 
 

Climate Summaries

Click on this map to access individual station summaries

 

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