Clearlake, CA Weather & Growing Conditions
Today
102°F
Sunny
Sunny, with a high near 102. South southeast wind 3 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 102°F | Sunny | 3 to 9 mph SSE | 0% |
| Tonight | 64°F | Mostly Clear | 0 to 7 mph WNW | 0% |
| Wednesday | 100°F | Sunny | 0 to 10 mph SE | 0% |
| Wednesday Night | 62°F | Clear | 0 to 7 mph W | 0% |
| Thursday | 99°F | Sunny | 0 to 7 mph S | 0% |
| Thursday Night | 63°F | Mostly Clear | 1 to 7 mph W | 0% |
| Friday | 101°F | Sunny | 0 to 7 mph W | 0% |
| Friday Night | 65°F | Clear | 1 to 7 mph W | 0% |
| Saturday | 102°F | Sunny | 1 to 8 mph NNW | 0% |
| Saturday Night | 64°F | Clear | 2 to 8 mph WNW | 0% |
| Sunday | 99°F | Sunny | 2 to 9 mph NW | 0% |
| Sunday Night | 60°F | Clear | 1 to 9 mph W | 0% |
| Monday | 94°F | Sunny | 1 to 7 mph ESE | 0% |
| Monday Night | 57°F | Mostly Clear | 1 to 7 mph W | 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 (5.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.