Maricopa County Climate
Maricopa County, Arizona
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
71.8°F
Annual Precip
9.4"
Annual Snowfall
0.0"
Extreme Heat Days
167
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
8,073
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Maricopa County
Climate Verdict
Maricopa County has a warm, averaging 71.8°F year-round, arid conditions receiving just 9.4 inches of precipitation annually, extreme heat exposure with 167.22000000000003 days per year above 90°F, light snow averaging 0.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 53.9°F. summers are scorching with July averaging 91.7°F. The 38°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Maricopa County is 8.3°F warmer than the Arizona statewide average of 63.5°F, it is somewhat drier than average for Arizona, the county experiences 53.80500840825843 more extreme heat days than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.