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City of El Cajon, CaliforniaEl Cajon, CA Weather Forecast
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El Cajon Weather Forecast
| TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  |  | | | | | | |  | |
| Partly Cloudy | Mostly Sunny | Patchy Fog | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Clear | Partly Cloudy |
| Lo: 57°FLo: 14°C | Hi: 78°FHi: 26°C | Lo: 57°FLo: 14°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 79°FHi: 26°C | Lo: 57°FLo: 14°C | Hi: 80°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 82°FHi: 28°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1152 AM PDT Thu Sep 17 2026 
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Issued: 155 PM PDT Thu Sep 17 2026
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...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
Today through this weekend...
Current satellite and 500mb RAP analysis this afternoon reveals a potent upper low centered across northern California this afternoon. This feature is inducing low thickness and southwesterly flow aloft, which is fueling the below average temperatures seen the last few days. Highs this afternoon are running around 10 degrees be...