Thermal, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thermal, a community in Riverside County, California.
This Afternoon
99°F
Sunny
Sunny, with a high near 99. Southeast wind 0 to 5 mph.
7-day forecast for Thermal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 0 to 5 mph SE | 0% |
| Tonight | 73°F | Clear | 5 to 15 mph NW | 0% |
| Saturday | 102°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 75°F | Mostly Clear | 0 to 5 mph N | 0% |
| Sunday | 100°F | Mostly Sunny | 0 to 10 mph E | 0% |
| Sunday Night | 76°F | Partly Cloudy | 5 mph SW | 1% |
| Monday | 98°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 72°F | Clear | 5 to 15 mph NW | 0% |
| Tuesday | 100°F | Sunny | 0 to 10 mph SW | 0% |
| Tuesday Night | 75°F | Clear | 0 to 15 mph NW | 0% |
| Wednesday | 103°F | Sunny | 5 to 15 mph NE | 0% |
| Wednesday Night | 77°F | Mostly Clear | 0 to 5 mph N | 3% |
| Thursday | 104°F | Sunny | 5 to 10 mph SE | 7% |
| Thursday Night | 79°F | Mostly Clear | 5 mph NW | 7% |
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 Sep 19, 2026.