Lake County Climate
Lake County, California
Avg Annual Temp
56.9°F
Annual Precip
36.2"
Annual Snowfall
0.3"
Extreme Heat Days
65.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.