Fresno County Climate
Fresno County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
61.7°F
Annual Precip
20.4"
Annual Snowfall
0.4"
Extreme Heat Days
97
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
4,946
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Fresno County
Climate Verdict
Fresno County has a warm, averaging 61.7°F year-round, semi-arid conditions with only 20.4 inches of annual precipitation, significant summer heat with 97.375 days annually above 90°F, light snow averaging 0.4 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 45.8°F. summers are warm — July averages 79.7°F. The 34°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
Fresno County is 3.0°F warmer than the California statewide average of 58.7°F, it is also noticeably drier, receiving 5.4 inches less precipitation than the state average, the county experiences 38.704075037066126 more extreme heat days than the state average.
Climate Profile
About Fresno County Weather
Warm and Semi-Arid Central Valley
Fresno County averages 61.7°F annually, making it notably warmer than the typical American county. Its semi-arid climate delivers just 20.4 inches of rain, though it receives more moisture than the deep desert.
A Standard for Valley Heat
The county's 61.7°F average temperature ranks it as one of the warmer regions in California, exceeding the state average of 58.7°F. It represents the classic thermal profile of the central San Joaquin Valley.
Dry Heat Away From the Coast
Fresno shares its intense valley heat with Madera and Kings counties, though it receives slightly more precipitation at 20.4 inches. Unlike the coastal counties to the west, it lacks the cooling influence of the Pacific Ocean.
Hot Summers and Negligible Snow
Summer averages reach 77.3°F with 97 days topping 90°F. Winters are mild at 46.8°F, and snowfall is almost non-existent at just 0.4 inches per year.
Prioritize Cooling and Water Efficiency
Reliable air conditioning is a non-negotiable requirement for the three months of extreme summer heat. Gardeners should prioritize drought-tolerant landscaping to manage the modest 20.4 inches of annual rainfall.
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.