Arizona weather records

Arizona records and calendars

Climate calendars are tools that provide a summary of records for an individual weather station, often based on the Calendar Year.

The Arizona climate calendars provide climate normals, means, and extremes for many active weather stations across the state. Climate normals are calculations based on 30-year monthly averages (means), often for maximum (high) and minimum (low) temperatures and total monthly precipitation.

Climate extremes are based on the period of record. The period of record is the extent of the time that the weather station has been in operation. For example, precipitation records for Yuma go back to 1876 and temperature records for Yuma go back to 1878. An extreme would be the highest, lowest, or greatest observation during the period of record.

The current 30-year climatological standard for climate normals runs from January 1, 1991 to December 31, 2020.

State Extreme Records

Arizona climate records are verified by the Arizona State Climatologist along with local National Weather Service partners and appropriate researchers in Arizona as members of the State Climate Extremes Committee (SCEC). Official records are then housed at the National Center for Environmental Information (NCEI).

Official Arizona Extreme Records

Click on this image to access Arizona weather records and climate calendars

Southwest climate summaries

Climate summaries are available for stations in Arizona and New Mexico. These records are available based on the Water Year (October to September), Calendar Year (January to December), and Monsoon Season (June 15-Sept 30).

Click on this image to access station records