When to go · San Diego
San Diego in September
Great month. Inside San Diego's best window: Mar–May, Sep–Nov.
Key facts
- Verdict
- Great
- Temperature
- 25°C77°F / 19°C66°F
- average high / low
- Rain days
- 1
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
GreatBest and avoid months for San Diego
Inside San Diego's best window: Mar–May, Sep–Nov.
Weather in September
- San DiegoHighs around 25 °C, lows around 19 °C, rain on about 1 dayHighs around 77 °F, lows around 66 °F, rain on about 1 day
- California coast, United States · San Francisco, Los Angeles, San Diego, Big Surbest weather
Mild all year; San Francisco is foggy and cool in summer; wildfire smoke possible June–November; winter storms can close Highway 1 at Big Sur.
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
What to pack
Nothing unusual for the weather this month.