Thermalito, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermalito, a community in Butte County, California.
Overnight
59°F
Clear
Clear. Low around 59, with temperatures rising to around 61 overnight. North northwest wind around 5 mph.
7-day forecast for Thermalito
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Clear | 5 mph NNW | 0% |
| Saturday | 91°F | Sunny | 5 mph S | 0% |
| Saturday Night | 60°F | Partly Cloudy | 2 to 7 mph ESE | 0% |
| Sunday | 87°F | Partly Sunny | 5 mph S | 0% |
| Sunday Night | 60°F | Mostly Cloudy | 0 to 5 mph SSE | 0% |
| Monday | 88°F | Mostly Sunny | 3 to 7 mph SSE | 0% |
| Monday Night | 59°F | Mostly Clear | 0 to 9 mph SSE | 0% |
| Tuesday | 88°F | Sunny | 0 to 5 mph SSW | 0% |
| Tuesday Night | 60°F | Clear | 1 to 5 mph ESE | 0% |
| Wednesday | 92°F | Sunny | 3 mph S | 0% |
| Wednesday Night | 61°F | Mostly Clear | 3 mph ESE | 0% |
| Thursday | 94°F | Sunny | 5 mph S | 0% |
| Thursday Night | 62°F | Mostly Clear | 5 mph ESE | 1% |
| Friday | 90°F | Sunny | 6 mph SSE | 1% |
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 Sep 19, 2026.