Humboldt County Climate
Humboldt County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
54.4°F
Annual Precip
50.6"
Annual Snowfall
0.9"
Extreme Heat Days
12
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
2,175
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Humboldt County
Climate Verdict
Humboldt County has a mild, with an average annual temperature of 54.4°F, moderately wet with 50.6 inches of annual precipitation, rare extreme heat with only 12.337499999999999 days above 90°F annually, light snow averaging 0.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 46.8°F. summers are pleasantly cool with July averaging 62.8°F. The climate is remarkably stable year-round, with only a 16°F difference between January and July. December is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Humboldt County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Humboldt County is 4.2°F cooler than the California statewide average of 58.7°F, it is also noticeably wetter, receiving 24.8 inches more precipitation than the state average, the county experiences 46.333424962933876 fewer extreme heat days than the state average.
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 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.