San Jacinto, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Jacinto, a city in Riverside County, California.
Today
102°F
Sunny
Sunny, with a high near 102. South wind 0 to 15 mph, with gusts as high as 25 mph.
7-day forecast for San Jacinto
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 102°F | Sunny | 0 to 15 mph S | 1% |
| Tonight | 67°F | Mostly Clear | 0 to 15 mph SW | 1% |
| Wednesday | 100°F | Sunny | 0 to 15 mph W | 1% |
| Wednesday Night | 67°F | Mostly Clear | 0 to 15 mph S | 0% |
| Thursday | 101°F | Sunny | 0 to 10 mph SW | 2% |
| Thursday Night | 68°F | Mostly Clear | 0 to 10 mph W | 2% |
| Friday | 103°F | Sunny | 0 to 10 mph W | 0% |
| Friday Night | 69°F | Mostly Clear | 0 to 10 mph W | 0% |
| Saturday | 105°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 69°F | Mostly Clear | 0 to 10 mph W | 1% |
| Sunday | 103°F | Sunny | 0 to 15 mph SW | 2% |
| Sunday Night | 67°F | Mostly Clear | 0 to 15 mph SW | 2% |
| Monday | 99°F | Sunny | 0 to 15 mph SW | 6% |
| Monday Night | 65°F | Mostly Clear | 0 to 15 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for San Jacinto (33.799, -116.996). Updated through the day.
Growing snapshot for San Jacinto
Last spring frost
Jan 31
First fall frost
Dec 10
Growing season
315 days
Hardiness zone
9b
More local growing data for San Jacinto: nearby ZIP 92582 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, San Jacinto, Ca (2.4 mi from San Jacinto). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.