El Cajon, CA Weather & Growing Conditions
Overnight
62°F
Partly Cloudy
Partly cloudy, with a low around 62. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Partly Cloudy | 0 mph | 2% |
| Saturday | 80°F | Sunny | 0 to 10 mph NW | 2% |
| Saturday Night | 62°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Sunday | 78°F | Partly Sunny | 0 to 10 mph W | 1% |
| Sunday Night | 63°F | Mostly Cloudy | 0 to 5 mph S | 2% |
| Monday | 77°F | Mostly Sunny | 0 to 10 mph SW | 1% |
| Monday Night | 62°F | Partly Cloudy | 0 to 5 mph NW | 1% |
| Tuesday | 78°F | Sunny | 0 to 10 mph NW | 1% |
| Tuesday Night | 62°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Wednesday | 82°F | Sunny | 0 to 10 mph NW | 0% |
| Wednesday Night | 63°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 84°F | Sunny | 0 to 10 mph NW | 4% |
| Thursday Night | 65°F | Mostly Clear | 0 to 5 mph NW | 4% |
| Friday | 86°F | Sunny | 0 to 10 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for El Cajon, CA
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10a
Explore more for El Cajon, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, El Cajon, Ca (2.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.