San Diego's Weather Forecast for Sept. 18, 2021: Comfortable weekend

Posted at 10:11 AM, Sep 18, 2021
and last updated 2021-09-19 02:28:27-04

Temperatures will trend near to below normal for the last summer weekend of 2021, then fall starts on Wednesday at 12:21 p.m.

Cooler conditions linger into Sunday then start to gradually warm, peaking Wednesday, then starting a cooling trend into next weekend. Wednesday, highs are expected to break through the 80s along the coast and 90s for inland valleys.

Winds will also be picking up through the early part of the upcoming week. They're going to shift to become more of a Santa Ana event. Those easterly winds are expected to bring in more dry air, also helping with that warming trend. Gusts up to 30 or 35 mph are possible. These dry, windy and warming conditions will create an elevated risk for fire.

The first half of the week will remain dry but the end of the week brings some uncertainty. There is a slight chance for a shift toward a monsoonal pattern into next weekend, which could bring increased moisture.

Sunday's Highs:
Coast: 69-78°
Inland: 75-83°
Mountains: 72-85°
Deserts: 94-103°

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