Merced County Climate
Merced County, California
Avg Annual Temp
62.8°F
Annual Precip
10.4"
Annual Snowfall
0.0"
Extreme Heat Days
97.9142857142857
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Merced County Weather
A warm and sun-drenched county
Merced County averages 62.8°F annually, which is significantly warmer than the national median. It is characterized by long periods of sunshine and very little annual rainfall.
Warmer than the average Californian
At 62.8°F, Merced is four degrees warmer than the state average of 58.7°F. This inland warmth is typical for the heart of the San Joaquin Valley.
Extremely dry compared to neighbors
Merced receives only 10.4 inches of precipitation, far below the California average of 25.8 inches. It is one of the drier populated regions in the state, with zero annual snowfall.
Nearly 100 days of extreme heat
Summer is dominated by 98 days over 90°F and a July average of 78.7°F. Winters are cool and dry, with a January average of 47.1°F and no snow to speak of.
Focus on cooling and hydration
The 98 days of extreme heat make high-performance air conditioning a non-negotiable for residents. Because the county only receives 10.4 inches of rain, water conservation and irrigation are critical year-round.
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.