San Diego's Weather Forecast for Sept. 22, 2021: Hot start to fall!

Posted at 5:26 AM, Sep 22, 2021
and last updated 2021-09-23 00:45:36-04

Wednesday brought record-breaking heat yet again to San Diego County. Campo tied the previous record of 101º set on this date. This follows a record-breaking Tuesday, where Ramona, Alpine and Vista all either tied or broke records.

The Heat Advisory for inland valleys expired at 8 p.m. Wednesday.

Now that Wednesday is over, temperatures will begin to cool. Thursday will still be above-average for inland valleys, but will be much degrees cooler. That cooling trend will continue into the weekend, bringing a mild weekend for most of the county.

Into this weekend, rain chances pick up for mountains and deserts. At this point, uncertainty remains high, but the Thursday through Sunday window brings slight chances for some storms in the mountains and deserts.

Winds have also been blowing and will remain gusty into Thursday. Gusts could get up to 40 mph in the deserts.

This weekend will be much more comfortable with low to mid-70s at the coast, low to mid-80s inland, 70s in the mountains and 90s in the deserts. The marine layer will return in the overnight and morning hours clearing to sunny skies. Nice into early next week.

Thursday's Highs:
Coast: 74-84°
Inland: 85-93°
Mountains: 78-91°
Deserts: 98-105°

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