Lassen County Climate
Lassen County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.3°F
Annual Precip
12.9"
Annual Snowfall
21.1"
Extreme Heat Days
31
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,329
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lassen County
Climate Verdict
Lassen County has a mild, with an average annual temperature of 50.3°F, arid conditions receiving just 12.9 inches of precipitation annually, occasional hot days — 30.6 per year above 90°F, moderate snowfall of 21.1 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 32.9°F. summers are warm — July averages 70.0°F. The 37°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Lassen County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Lassen County is 8.4°F cooler than the California statewide average of 58.7°F, it is also noticeably drier, receiving 12.8 inches less precipitation than the state average, the county experiences 28.070924962933873 fewer extreme heat days than the state average.
Climate Profile
About Lassen County Weather
Cooler mountain air and high-desert vibes
Lassen County averages 50.3°F annually, which is notably cooler than the national median. This high-altitude climate defines the region as one of the crisper environments in the American West.
One of California's coolest counties
Lassen stands out as a cold pocket in the Golden State, with its 50.3°F average trailing the state median of 58.7°F by over eight degrees. It offers a starkly different climate experience than the coastal or valley regions.
Dry winters with heavy snow
Lassen receives only 12.9 inches of total precipitation, less than half the state average of 25.8 inches. However, much of that falls as snow, with 21.1 inches piling up annually compared to the near-zero totals in neighboring lowlands.
Brief summers and freezing winters
Winter temperatures average a chilly 34.3°F, while the summer peak in July hits a comfortable 70.0°F. The county sees 31 days of extreme heat per year, providing a balanced but distinctly four-season cycle.
Invest in winter gear and insulation
Residents need high-quality heating systems and snow removal equipment to manage the 21 inches of annual snowfall. Outdoor planning should focus on the temperate summer window when temperatures rarely become oppressive.
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.