El Cajon, CA Weather & Growing Conditions
This Afternoon
75°F
Mostly Sunny
Mostly sunny, with a high near 75. Northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Mostly Sunny | 10 mph NW | 1% |
| Tonight | 57°F | Slight Chance Rain Showers | 0 to 5 mph N | 18% |
| Wednesday | 75°F | Patchy Fog then Mostly Sunny | 0 to 5 mph NW | 1% |
| Wednesday Night | 55°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Thursday | 79°F | Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 84°F | Sunny | 0 to 5 mph N | 0% |
| Friday Night | 57°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 88°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 59°F | Mostly Clear | 5 to 10 mph NE | 0% |
| Sunday | 88°F | Sunny | 0 to 5 mph NW | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 85°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Monday Night | 61°F | Partly Cloudy | 0 to 5 mph N | 0% |
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 Nov 4, 2026.