San Francisco Weather Forecast

    • 61
    • 72

    Chance Rain Showers

    • 60
    • 73

    Slight Chance Rain Showers

    • 60
    • 74

    Mostly Sunny

    • 60
    • 74

    Mostly Sunny

    • 61
    • 80

    Mostly Sunny

    • 62
    • 76

    Slight Chance Rain Showers

Today 18 Sep San Francisco

Mostly cloudy. A slight chance of Showers in the Morning, then a chance of Showers and isolated Thunderstorms in the afternoon. Highs in the lower 60s to mid 70s. Southwest Winds 5 to 15 Mph.

Tonight 18 Sep San Francisco

Mostly cloudy. A chance of Showers and isolated Thunderstorms. Lows in the lower 60s. Southwest Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Francisco Temperature Statistics

September Temperature

Oakland, Metro Oakland International Airport (10.6 miles)

  • Lowest 8 September, 2025

    57.9 °F

  • Average September

    65.8 °F

  • Highest 15 September, 2025

    84 °F

Climate (2020–Present)

Oakland, Metro Oakland International Airport (10.6 miles)

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  • Average Low 2020–2025

    51 °F

  • Average 2020–2025

    58.7 °F

  • Average High 2020–2025

    67.2 °F
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