Thermalito, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermalito, a community in Butte County, California.
Today
104°F
Sunny
Sunny, with a high near 104. South wind 0 to 8 mph.
7-day forecast for Thermalito
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 104°F | Sunny | 0 to 8 mph S | 0% |
| Tonight | 68°F | Mostly Clear | 1 to 9 mph SE | 0% |
| Wednesday | 102°F | Sunny | 1 to 8 mph S | 0% |
| Wednesday Night | 68°F | Clear | 0 to 8 mph SSE | 0% |
| Thursday | 102°F | Sunny | 0 to 8 mph SSW | 0% |
| Thursday Night | 69°F | Clear | 0 to 8 mph SSE | 0% |
| Friday | 102°F | Sunny | 0 to 6 mph SW | 0% |
| Friday Night | 70°F | Clear | 2 to 6 mph SE | 0% |
| Saturday | 102°F | Sunny | 1 to 6 mph S | 0% |
| Saturday Night | 70°F | Clear | 2 to 6 mph SE | 0% |
| Sunday | 100°F | Sunny | 1 to 8 mph S | 0% |
| Sunday Night | 67°F | Clear | 3 to 8 mph SE | 1% |
| Monday | 96°F | Sunny | 2 to 9 mph SSE | 1% |
| Monday Night | 64°F | Mostly Clear | 2 to 9 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Thermalito (39.509, -121.601). Updated through the day.
Growing snapshot for Thermalito
Last spring frost
Jan 30
First fall frost
Dec 13
Growing season
321 days
Hardiness zone
9b
More local growing data for Thermalito: nearby ZIP 95965 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Oroville, Ca (5.5 mi from Thermalito). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.