Clearlake, CA Weather & Growing Conditions
Tonight
57°F
Mostly Clear
Mostly clear, with a low around 57. Northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Mostly Clear | 3 mph NW | 0% |
| Saturday | 90°F | Sunny | 1 to 6 mph NNW | 0% |
| Saturday Night | 58°F | Mostly Cloudy | 0 to 6 mph WSW | 0% |
| Sunday | 86°F | Mostly Cloudy | 0 to 6 mph SE | 0% |
| Sunday Night | 57°F | Mostly Cloudy | 0 to 5 mph W | 0% |
| Monday | 89°F | Sunny | 0 to 8 mph NNE | 0% |
| Monday Night | 57°F | Mostly Clear | 0 to 8 mph SW | 0% |
| Tuesday | 90°F | Sunny | 0 to 7 mph SSE | 0% |
| Tuesday Night | 57°F | Clear | 0 to 7 mph WNW | 0% |
| Wednesday | 91°F | Sunny | 0 to 5 mph ENE | 0% |
| Wednesday Night | 60°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Thursday | 92°F | Sunny | 0 to 7 mph ESE | 0% |
| Thursday Night | 58°F | Mostly Clear | 0 to 7 mph SW | 1% |
| Friday | 86°F | Mostly Sunny | 0 to 7 mph WSW | 1% |
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 Sep 19, 2026.