Fort Irwin, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fort Irwin, a community in San Bernardino County, California.
Today
108°F
Sunny
Sunny, with a high near 108. West southwest wind 2 to 12 mph, with gusts as high as 18 mph.
7-day forecast for Fort Irwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 108°F | Sunny | 2 to 12 mph WSW | 0% |
| Tonight | 77°F | Clear | 3 to 14 mph WSW | 0% |
| Wednesday | 108°F | Sunny | 1 to 8 mph SW | 0% |
| Wednesday Night | 77°F | Clear | 2 to 9 mph WSW | 0% |
| Thursday | 107°F | Sunny | 0 to 5 mph SSW | 0% |
| Thursday Night | 78°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Friday | 107°F | Sunny | 1 to 5 mph SW | 1% |
| Friday Night | 79°F | Clear | 6 to 9 mph WSW | 1% |
| Saturday | 109°F | Sunny | 2 to 7 mph SW | 4% |
| Saturday Night | 79°F | Mostly Clear | 3 to 10 mph WSW | 4% |
| Sunday | 107°F | Sunny | 3 to 12 mph SSW | 3% |
| Sunday Night | 78°F | Mostly Clear | 3 to 14 mph SW | 3% |
| Monday | 104°F | Mostly Sunny | 3 to 14 mph SSW | 8% |
| Monday Night | 74°F | Mostly Clear | 5 to 16 mph SW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Fort Irwin (35.248, -116.683). Updated through the day.
Growing snapshot for Fort Irwin
Last spring frost
Feb 19
First fall frost
Nov 26
Growing season
279 days
Hardiness zone
9a
More local growing data for Fort Irwin: nearby ZIP 92310 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Barstow Daggett Ap, Ca (33.2 mi from Fort Irwin). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.