Shasta County Climate
Shasta County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
56.0°F
Annual Precip
45.6"
Annual Snowfall
13.2"
Extreme Heat Days
70
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
3,587
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Shasta County
Climate Verdict
Shasta County has a mild, with an average annual temperature of 56.0°F, moderately wet with 45.6 inches of annual precipitation, significant summer heat with 69.5 days annually above 90°F, light snow averaging 13.2 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 40.9°F. summers are warm — July averages 75.1°F. The 34°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
Shasta County closely matches the California statewide average temperature of 58.7°F, it is also noticeably wetter, receiving 19.8 inches more precipitation than the state average.
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 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.