Shasta County Climate
Shasta County, California
Avg Annual Temp
56.0°F
Annual Precip
45.6"
Annual Snowfall
13.2"
Extreme Heat Days
69.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Shasta County Weather
A Northern County of High Extremes
Shasta's 56.0°F annual average is close to the national median, but the figure masks significant seasonal volatility. The county experiences much harsher swings than California's coastal regions.
Cooler and Wetter Than the State Average
Shasta is cooler than the 58.7°F California average. However, it receives a massive 45.6 inches of annual precipitation, nearly double the state's 25.8-inch average.
Wetter and Hotter Than Northern Neighbors
Shasta is much wetter than Siskiyou to the north, which receives only 22.8 inches. It also faces 70 days of extreme heat, far more than most coastal California counties.
Intense Summer Heat and Snowy Winters
The county faces a staggering 70 days over 90°F, yet also records 13.2 inches of annual snowfall. July averages reach a hot 75.1°F, while winter averages drop to 41.4°F.
Dual-Season Home and Vehicle Prep
Robust HVAC systems are mandatory to handle the 70 days of high heat and freezing winter lows. Homeowners must also prepare for heavy rainfall and occasional snow removal.
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.