Harman US

Clearlake, CA Weather & Growing Conditions

Overnight
66°F
Clear
Clear, with a low around 66. Northeast wind around 3 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 66°F Clear 3 mph NE 0%
Tuesday 101°F Sunny 3 to 10 mph ESE 0%
Tuesday Night 64°F Mostly Clear 0 to 10 mph SW 0%
Wednesday 99°F Sunny 0 to 12 mph SE 0%
Wednesday Night 62°F Clear 0 to 9 mph WSW 0%
Thursday 99°F Sunny 0 to 7 mph E 0%
Thursday Night 64°F Mostly Clear 0 to 7 mph W 0%
Friday 101°F Sunny 0 to 7 mph NE 0%
Friday Night 66°F Clear 1 to 7 mph WNW 0%
Saturday 102°F Sunny 1 to 8 mph N 0%
Saturday Night 65°F Clear 2 to 8 mph W 0%
Sunday 99°F Sunny 2 to 9 mph NNE 0%
Sunday Night 61°F Clear 1 to 9 mph W 0%
Monday 94°F Sunny 1 to 8 mph ESE 0%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Clearlake, CA

Last spring frost
Apr 10
First fall frost
Nov 6
Growing season
209 days
Hardiness zone
9a

Explore more for Clearlake, CA: full frost dates · planting calendar · California frost dates

Climate data from the nearest NOAA station, Clearlake 4 Se, Ca (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.