Lake County Climate
Lake County, California
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
56.9°F
Annual Precip
36.2"
Annual Snowfall
0.3"
Extreme Heat Days
66
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9a
Minimum winter temperature range for plant survival
3,335
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Lake County
Climate Verdict
Lake County has a mild, with an average annual temperature of 56.9°F, moderate rainfall of 36.2 inches per year, significant summer heat with 65.8 days annually above 90°F, light snow averaging 0.3 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 43.7°F. summers are warm — July averages 73.6°F. The climate is remarkably stable year-round, with only a 30°F difference between January and July.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Lake County closely matches the California statewide average temperature of 58.7°F, it is also noticeably wetter, receiving 10.5 inches more precipitation than the state average.
Climate Profile
About Lake County Weather
Warmer than the national average
Lake County maintains an annual average temperature of 56.9°F, placing it above the national median for U.S. counties. Its Mediterranean climate offers a milder profile than many central states while staying comfortably warm year-round.
Cooler than the California norm
While Lake County is warm by national standards, its 56.9°F average sits nearly two degrees below the California state average of 58.7°F. This makes it a temperate retreat compared to the blistering heat of the state's southern regions.
A wetter alternative to the valley
With 36.2 inches of annual precipitation, Lake County is significantly wetter than the California average of 25.8 inches. It serves as a lush, water-rich neighbor to the drier counties in the Sacramento Valley to the east.
Sixty-six days of extreme heat
Summers are intense with 66 days reaching over 90°F and a July average of 73.6°F. Winters remain mild with a January average of 43.7°F and almost no measurable snowfall at just 0.3 inches annually.
Prepare for long, dry summers
Reliable air conditioning is essential given the two months of extreme heat days each year. Residents should also plan for heavy winter rains, as the county receives roughly 10 inches more precipitation than the typical California community.
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.