Clearlake, CA Weather & Growing Conditions
This Afternoon
52°F
Chance Light Rain
A chance of rain. Mostly cloudy. High near 52, with temperatures falling to around 48 in the afternoon. East northeast wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Chance Light Rain | 9 mph ENE | 44% |
| Tonight | 40°F | Chance Light Rain then Mostly Cloudy | 7 to 10 mph ENE | 44% |
| Wednesday | 63°F | Mostly Sunny | 5 to 8 mph N | 0% |
| Wednesday Night | 42°F | Mostly Cloudy | 2 to 8 mph NNW | 0% |
| Thursday | 68°F | Sunny | 5 mph NNW | 0% |
| Thursday Night | 46°F | Mostly Clear | 2 mph NW | 0% |
| Friday | 72°F | Sunny | 2 mph NNW | 0% |
| Friday Night | 48°F | Mostly Clear | 1 mph NNW | 0% |
| Saturday | 72°F | Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 47°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 70°F | Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 47°F | Mostly Cloudy | 2 mph NW | 0% |
| Monday | 68°F | Mostly Sunny | 3 mph W | 3% |
| Monday Night | 46°F | Partly Cloudy | 0 to 3 mph NW | 3% |
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 Nov 4, 2026.