Humboldt County Climate
Humboldt County, California
Avg Annual Temp
54.4°F
Annual Precip
50.6"
Annual Snowfall
0.9"
Extreme Heat Days
12.3375
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Humboldt County Weather
Cool and Exceptionally Wet
Humboldt County maintains a cool 54.4°F annual average, influenced by its position on the Pacific coast. Its 50.6 inches of precipitation is nearly double the California state average, marking it as a temperate rainforest environment.
Cooler and Greener Than Most
The county is significantly cooler than the California average of 58.7°F. While much of the state grapples with heat, Humboldt's maritime influence keeps its annual temperature profile relatively low.
A Coastal Climate Sanctuary
Humboldt is wetter and cooler than interior Trinity County, receiving over 50 inches of rain annually. It shares its misty, temperate characteristics with Del Norte County to the north.
Narrow Seasonal Temperature Swings
Seasonal swings are narrow, with summers averaging 61.9°F and winters at 47.0°F. Extreme heat is rare, with only 12 days per year reaching 90°F, while snowfall remains negligible at 0.9 inches.
Prepare for the Rain
Waterproof gear and umbrellas are daily essentials to handle the 50.6 inches of annual rainfall. While heavy air conditioning is rarely needed, residents should focus on moisture control and efficient heating for damp winters.
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.