Jamul, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamul, a community in San Diego County, California.
Overnight
63°F
Patchy Fog
Patchy fog. Partly cloudy, with a low around 63. Southwest wind 0 to 5 mph.
7-day forecast for Jamul
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Patchy Fog | 0 to 5 mph SW | 0% |
| Tuesday | 84°F | Patchy Fog then Sunny | 0 to 10 mph W | 1% |
| Tuesday Night | 63°F | Mostly Clear then Patchy Fog | 0 to 5 mph W | 1% |
| Wednesday | 84°F | Patchy Fog then Sunny | 0 to 10 mph W | 2% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 5 mph W | 1% |
| Thursday | 86°F | Patchy Fog then Sunny | 0 to 10 mph SW | 2% |
| Thursday Night | 65°F | Mostly Clear then Patchy Fog | 0 to 5 mph W | 1% |
| Friday | 87°F | Patchy Fog then Sunny | 0 to 10 mph NW | 1% |
| Friday Night | 65°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Saturday | 88°F | Sunny | 0 to 10 mph W | 1% |
| Saturday Night | 65°F | Mostly Clear | 0 to 10 mph W | 1% |
| Sunday | 87°F | Sunny | 0 to 10 mph W | 4% |
| Sunday Night | 64°F | Mostly Clear | 0 to 10 mph W | 4% |
| Monday | 85°F | Sunny | 0 to 10 mph SW | 8% |
Forecast source: National Weather Service (api.weather.gov) for Jamul (32.718, -116.871). Updated through the day.
Growing snapshot for Jamul
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10b
More local growing data for Jamul: nearby ZIP 92019 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, El Cajon, Ca (3.6 mi from Jamul). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.