Tuolumne County Climate
Tuolumne County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
57.2°F
Annual Precip
37.1"
Annual Snowfall
28.5"
Extreme Heat Days
59
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
3,642
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Tuolumne County
Climate Verdict
Tuolumne County has a mild, with an average annual temperature of 57.2°F, moderate rainfall of 37.1 inches per year, occasional hot days — 58.540000000000006 per year above 90°F, moderate snowfall of 28.5 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 43.0°F. summers are warm — July averages 75.2°F. The 32°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Tuolumne County closely matches the California statewide average temperature of 58.7°F, it is also noticeably wetter, receiving 11.4 inches more precipitation than the state average.
Climate Profile
About Tuolumne County Weather
Above the U.S. temperature median
Tuolumne County’s 57.2°F average annual temperature is higher than the national median, signaling its temperate Sierra Foothills location. It offers a moderate climate that avoids the extreme cold of the Rockies. The weather is balanced and generally inviting.
Cooler than the state average
At 57.2°F, the county is slightly cooler than the California state average of 58.7°F. Its elevation provides a natural cooling effect compared to the adjacent valley floor. This makes it a popular escape from the more intense California heat.
Abundant mountain precipitation
Tuolumne receives a generous 37.1 inches of rain annually, far exceeding the state average of 25.8 inches. It is much wetter than nearby Tulare, which averages 22.5 inches. This moisture supports the county's vast forest and wilderness areas.
Significant snow and summer sun
The county averages 28.5 inches of snow per year and a winter temperature of 43.4°F. Summers are warm, with 59 extreme heat days and a 72.6°F average. It is a true four-season destination with distinct weather transitions.
Prepare for significant snowfall
Residents must maintain snow tires and shovels to manage the 28.5-inch annual snow average. Cooling systems are also necessary for the two months of extreme summer heat. Home preparation should include gutter maintenance to handle the high 37.1-inch 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.