San Francisco, Calif. – California’s early fall weather turns from sunny skies to potential rain by Tuesday, raising travel concerns for Bay Area drivers. Commuters along I-80 and Highway 101 should prepare for slick pavement and slower traffic if light showers develop Tuesday afternoon.
According to the National Weather Service, a slight chance of rain builds by Tuesday, September 22, after several days of sunshine and highs near the upper 70s. Winds may increase, adding to hazardous conditions during peak travel hours. Authorities urge drivers to allow extra time and avoid sudden stops on bridges and highways.
This weekend stays mostly sunny with highs in the low to mid-70s, making for pleasant outdoor plans. Nights dip into the upper 50s and lower 60s, ideal for cool evenings around the Bay. By Monday, clear skies continue with highs near 77 before the weather shifts Tuesday.
If showers materialize, the light rain could dampen parts of San Francisco, Oakland, and surrounding East Bay cities. Though totals look minimal, the first sign of September moisture after dry days could impact visibility and road traction.
Residents should keep devices charged, secure outdoor furniture ahead of gusts, and watch for sudden changes in commute conditions. Another stretch of dry, sunny weather looks likely midweek, but forecasters caution that fall patterns are setting in across Northern California.
Warnings remain limited, but updates may be issued as Tuesday approaches.
Five Day Forecast for San Francisco, CA
- Sunday: Sunny, high 72, low 59.
- Monday: Sunny, high 77, low 60.
- Tuesday: Slight chance of rain, high 78, low 61.
- Wednesday: Mostly sunny, high 74, low 60.
- Thursday: Sunny, high 73, low 58.
