Maricopa County Climate
Maricopa County, Arizona
Avg Annual Temp
71.8°F
Annual Precip
9.4"
Annual Snowfall
0.0"
Extreme Heat Days
167.22000000000003
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Maricopa County Weather
America's Desert Metropolis Climate
Maricopa's 71.8°F annual average is among the highest in the United States. This desert powerhouse receives only 9.4 inches of rain, well below the national average.
Well Above the Arizona Average
Maricopa is significantly warmer than the state average of 63.5°F. It serves as the urban heat center of Arizona, characterized by 167 extreme heat days annually.
Hotter and Drier Than Gila
While slightly cooler than La Paz, Maricopa is far hotter and drier than its eastern neighbor Gila. It records zero snowfall, whereas Gila sees over 5 inches.
Blistering July and Snowless Winters
July is blistering with an average temperature of 91.7°F. Winters provide a mild escape, with average temperatures of 54.4°F and absolutely no recorded snow.
Manage the Urban Heat Island
High-performance air conditioning is a non-negotiable requirement for the 167 days of extreme heat. Plan outdoor activities for early morning or late evening during the long summer.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.