California · NWS SGX office

El Cajon, CA weather

It is 56°F at EW3070 Rancho San Diego as of Oct 28, 2:10 AM PDT. Overnight: Mostly Cloudy, low near 55°F. Forecast from the National Weather Service, issued Oct 28, 12:03 AM PDT.

Updated Oct 28, 2:16 AM PDT (snapshot)

Current conditions

Temperature

56°F

Mostly Cloudy

Wind

Calm

Humidity 91% · dew point 53°F

Pressure · visibility

29.97 inHg

Visibility —

Observed at EW3070 Rancho San Diego (E3070), Oct 28, 2:10 AM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the El Cajon forecast zone right now.

Around the NWS SGX forecast area

1 active alert covers zones served by the SGX office near El Cajon:

  • Coastal Flood Warning

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for El Cajon (local time)
TimeTempForecastPrecip. chanceWind
Wed 2 AM57°FMostly Cloudy0%E 5 mph
Wed 3 AM56°FMostly Cloudy0% 0 mph
Wed 4 AM56°FMostly Cloudy0% 0 mph
Wed 5 AM55°FMostly Cloudy0% 0 mph
Wed 6 AM55°FMostly Cloudy0% 0 mph
Wed 7 AM55°FMostly Cloudy0% 0 mph
Wed 8 AM56°FMostly Sunny0% 0 mph
Wed 9 AM60°FMostly Sunny0% 0 mph
Wed 10 AM64°FMostly Sunny0% 0 mph
Wed 11 AM71°FSunny0% 0 mph
Wed 12 PM74°FSunny0% 0 mph
Wed 1 PM76°FSunny0%SW 5 mph
Wed 2 PM77°FMostly Sunny0%SW 5 mph
Wed 3 PM76°FMostly Sunny0%SW 10 mph
Wed 4 PM75°FMostly Sunny0%W 10 mph
Wed 5 PM73°FMostly Sunny1%W 5 mph
Wed 6 PM69°FPartly Cloudy1%W 5 mph
Wed 7 PM66°FPartly Cloudy1%W 5 mph
Wed 8 PM64°FMostly Cloudy1%W 5 mph
Wed 9 PM63°FMostly Cloudy1% 0 mph
Wed 10 PM62°FMostly Cloudy1% 0 mph
Wed 11 PM61°FMostly Cloudy0% 0 mph
Thu 12 AM60°FMostly Cloudy0% 0 mph
Thu 1 AM60°FMostly Cloudy0% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in El Cajon can differ.

7-day forecast

Overnight

Low 55°F

Mostly cloudy, with a low around 55. East wind 0 to 5 mph.

Wednesday

High 77°F·Low 56°F

Mostly sunny, with a high near 77. South wind 0 to 10 mph.

Wednesday Night: Mostly cloudy, with a low around 56. West wind 0 to 5 mph.

Thursday

High 75°F·Low 59°F

Mostly sunny, with a high near 75. South wind 0 to 10 mph.

Thursday Night: A slight chance of rain showers between 11pm and 5am. Mostly cloudy, with a low around 59. Southwest wind 0 to 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

Friday

High 72°F·Low 56°F

Partly sunny, with a high near 72.

Friday Night: Mostly cloudy, with a low around 56.

Saturday

High 74°F·Low 57°F

A chance of rain showers after 5pm. Mostly cloudy, with a high near 74.

Saturday Night: Rain showers likely. Cloudy, with a low around 57.

Sunday

High 71°F·Low 55°F

Rain showers likely. Mostly cloudy, with a high near 71.

Sunday Night: A chance of rain showers before 10pm. Partly cloudy, with a low around 55.

Monday

High 77°F·Low 55°F

Sunny, with a high near 77.

Monday Night: Mostly clear, with a low around 55.

Tuesday

High 78°F

Sunny, with a high near 78.

Nearby cities

Larger cities in the area

Other cities in San Diego County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
El Cajon is served by the National Weather Service SGX forecast office, forecast zone CAZ050, county zone CAC073.
Location used
The Census Bureau's internal point for El Cajon (32.8017, -116.9605), in San Diego County. Population: 103,291 (2024 estimate), number 70 of the 296 California cities on this site.
Radar
Nearest NWS radar: KNKX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/32.8017,-116.9605 (forecast issued Oct 28, 12:03 AM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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