Mono County Climate
Mono County, California
Avg Annual Temp
43.9°F
Annual Precip
17.0"
Annual Snowfall
65.1"
Extreme Heat Days
3.975
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Mono County Weather
A Cold Mountain Stronghold
Mono County is one of the coldest spots in the country with an annual average of just 43.9°F. This is well below the national median, placing it firmly in a subalpine climate category.
One of California's Coldest Regions
The county’s average temperature sits nearly 15 degrees below the California state average of 58.7°F. Despite its mountain status, its 17.0 inches of precipitation remains below the state average of 25.8 inches.
Colder Than Its Sierra Neighbors
Mono County is notably chillier than Nevada County, which averages 48.0°F. While its neighbor to the north is wetter, Mono specializes in cold, dry air and high-elevation extremes.
Endless Snow and Mild Summers
Winters are dominated by 65.1 inches of snow and a frigid January average of 27.6°F. Summer heat is almost non-existent here, with only 4 days reaching 90°F annually.
Gear Up for Serious Snow
Heavy-duty heating systems and snow removal equipment are vital for the long, snowy winters. Residents rarely need air conditioning as summer averages remain a comfortable 60.7°F.
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.