Tuolumne County Climate
Tuolumne County, California
Avg Annual Temp
57.2°F
Annual Precip
37.1"
Annual Snowfall
28.5"
Extreme Heat Days
58.540000000000006
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.