Thermalito, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermalito, a community in Butte County, California.
This Afternoon
91°F
Sunny
Sunny, with a high near 91. West southwest wind around 5 mph.
7-day forecast for Thermalito
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 91°F | Sunny | 5 mph WSW | 0% |
| Tonight | 61°F | Mostly Clear | 3 to 8 mph ESE | 0% |
| Sunday | 88°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Sunday Night | 61°F | Mostly Cloudy | 0 to 5 mph SE | 0% |
| Monday | 88°F | Sunny | 2 to 9 mph S | 0% |
| Monday Night | 59°F | Mostly Clear | 0 to 9 mph SE | 0% |
| Tuesday | 87°F | Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 60°F | Clear | 1 to 5 mph ESE | 0% |
| Wednesday | 90°F | Sunny | 3 mph SW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 2 mph E | 0% |
| Thursday | 93°F | Sunny | 5 mph SSE | 0% |
| Thursday Night | 62°F | Mostly Clear | 5 mph ESE | 0% |
| Friday | 90°F | Sunny | 6 mph SSE | 1% |
| Friday Night | 61°F | Mostly Clear | 6 mph SE | 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.