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City of La Mesa, CALa Mesa, CA Weather Forecast
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La Mesa Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY |
 |  |  |  | |  |  |  | | | | |
| Mostly Clear | Mostly Sunny | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy |
| Lo: 58°FLo: 14°C | Hi: 83°FHi: 28°C | Lo: 58°FLo: 14°C | Hi: 84°FHi: 29°C | Lo: 64°FLo: 18°C | Hi: 87°FHi: 31°C | Lo: 68°FLo: 20°C | Hi: 87°FHi: 31°C | Lo: 68°FLo: 20°C | Hi: 87°FHi: 31°C | Lo: 66°FLo: 19°C | Hi: 87°FHi: 31°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1205 PM PDT Wed Sep 02 2026 
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Issued: 502 PM PDT Wed Sep 2 2026
Discussion
...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...
...UPDATED AVIATION DISCUSSION...
This afternoon...The marine layer remains about 1500 ft deep and a few low clouds are lingering at the beaches. Otherwise skies are clear. Temperatures are generally near or a few degrees lower than at this time yesterday. Sfc pressure gradients remain onshore and are supporting westerly winds gusting 25 to 40 mph in the mt...