Yolo County Climate
Yolo County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
62.1°F
Annual Precip
21.1"
Annual Snowfall
0.0"
Extreme Heat Days
97
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
4,754
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Yolo County
Climate Verdict
Yolo County has a warm, averaging 62.1°F year-round, semi-arid conditions with only 21.1 inches of annual precipitation, significant summer heat with 96.7 days annually above 90°F, virtually no measurable snowfall. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 46.9°F. summers are warm — July averages 76.4°F. The climate is remarkably stable year-round, with only a 29°F difference between January and July.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Yolo County is 3.5°F warmer than the California statewide average of 58.7°F, it is somewhat drier than average for California, the county experiences 38.02907503706613 more extreme heat days than the state average.
Climate Profile
About Yolo County Weather
A Warmer Mediterranean Climate in Yolo
Yolo County's 62.1°F average annual temperature sits significantly higher than the national median, characterizing its classic Mediterranean climate. The county receives just 21.1 inches of annual precipitation, contributing to its dry and sun-drenched landscape.
Exceeding California's Average Warmth
At 62.1°F, Yolo maintains a warmer profile than the California state average of 58.7°F. This inland position prevents the cooling coastal effects found in many other California counties, keeping annual averages high.
Drier and Warmer Than Eastern Neighbors
Yolo is slightly warmer than neighboring Yuba County, which averages 61.7°F. While Yuba receives a substantial 35.8 inches of rain, Yolo operates on a much drier 21.1 inches annually.
Sizzling Summers and Snowless Winters
Summers are intense with 97 days reaching 90°F or higher and a July average of 76.4°F. Winters remain very mild at 48.4°F, with no annual snowfall recorded in the county.
Prepare for Prolonged Summer Heat
Residents must invest in robust HVAC systems to handle nearly 100 days of extreme heat each year. Outdoor planning is most flexible during the mild 46.9°F January days when temperatures remain well above freezing.
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.