Siskiyou County Climate
Siskiyou County, California
Avg Annual Temp
51.5°F
Annual Precip
22.8"
Annual Snowfall
16.4"
Extreme Heat Days
47.93333333333333
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Siskiyou County Weather
California's Rugged Northern Frontier
Siskiyou averages 51.5°F, making it significantly cooler than the national median. This reflects its high-latitude position near the Oregon border.
Deep Below the State Temperature Average
The county is 7.2 degrees cooler than the California state average of 58.7°F. It represents the colder, more mountainous side of the Golden State's climate.
Drier and Colder Than Its Neighbors
Siskiyou receives 22.8 inches of rain, which is less than half the amount Shasta receives. However, it still records 16.4 inches of snow, identifying it as a true alpine environment.
Freezing Winters and Intense Heat Days
Winters are harsh for California, averaging just 36.5°F with significant snow. Paradoxically, the county also sees 48 days of extreme heat with a July average of 71.2°F.
Winter Wood Stoves and Summer Cooling
Heating systems must be robust to handle the 36.5°F winter average and 16.4 inches of snow. Prepare for a true four-season cycle that includes nearly 50 days of extreme heat.
Frequently Asked Questions
What is the average temperature in Siskiyou County?
How much rain does Siskiyou County get?
Does it snow in Siskiyou County?
How hot does Siskiyou County get in summer?
How cold are winters in Siskiyou County?
Track your own weather in Siskiyou County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.