Clearlake, CA Weather & Growing Conditions
Overnight
66°F
Clear
Clear, with a low around 66. Northeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.