Thermal, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermal, a community in Riverside County, California.
This Afternoon
81°F
Mostly Sunny
Mostly sunny, with a high near 81. Southeast wind around 5 mph.
7-day forecast for Thermal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 81°F | Mostly Sunny | 5 mph SE | 0% |
| Tonight | 58°F | Mostly Clear | 0 to 10 mph N | 0% |
| Wednesday | 83°F | Sunny | 0 to 10 mph NW | 0% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 10 mph N | 0% |
| Thursday | 83°F | Sunny | 5 to 10 mph NE | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 15 mph N | 0% |
| Friday | 86°F | Sunny | 10 to 15 mph N | 0% |
| Friday Night | 62°F | Clear | 10 to 15 mph N | 0% |
| Saturday | 87°F | Sunny | 5 to 15 mph N | 0% |
| Saturday Night | 62°F | Mostly Clear | 5 mph N | 0% |
| Sunday | 86°F | Sunny | 0 to 5 mph N | 0% |
| Sunday Night | 64°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Monday | 86°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Monday Night | 63°F | Mostly Clear | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov) for Thermal (33.626, -116.131). Updated through the day.
Growing snapshot for Thermal
Last spring frost
Feb 7
First fall frost
Dec 2
Growing season
298 days
Hardiness zone
10a
More local growing data for Thermal: nearby ZIP 92236 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Desert Resorts Rgnl Ap, Ca (7.3 mi from Thermal). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.