San Diego
FallGood time to go ~78°F highs
Things to do in San Diego in September
September is a good month to visit San Diego, with average highs around 78°F. Crisp air and changing leaves make parks and viewpoints shine.
Best picks for September
What's famous here, weighted toward what shines in September.
Holidays in September 2027
- Labour Day · Mon, Sep 6
Expect busier roads and pricier stays around these dates. See long weekends.
Also great in September in California
San Diego in September: quick answers
Is September a good time to visit San Diego?
September is a good month to visit San Diego, with average highs around 78°F. Crisp air and changing leaves make parks and viewpoints shine.
What is the weather like in San Diego in September?
Average daytime highs are around 78°F, compared with 78°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.
What are the best things to do in San Diego in September?
Top picks for September: Joshua Tree National Park, San Diego Zoo, Balboa Park, Cabrillo National Monument, Anza-Borrego Desert State Park.
