San Francisco Bay - Fort Mason Weather Forecast

    • 59
    • 62

    Becoming Sunny

    • 59
    • 63

    Partly Sunny

    • 59
    • 65

    Partly Sunny

    • 59
    • 62

    Mostly Cloudy

    • 60
    • 64

    Partly Sunny

    • 60
    • 67

    Mostly Sunny

Today 17 Sep San Francisco

Mostly cloudy in the morning then becoming sunny. A slight chance of drizzle in the morning. Highs in the mid 60s to lower 70s. Southwest Winds 5 to 10 Mph.

Tonight 17 Sep San Francisco

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 50s. West Winds 5 to 10 Mph.

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San Francisco Bay - Fort Mason Temperature Statistics

September Temperature

Oakland, Metro Oakland International Airport (12.4 miles)

  • Lowest 7 September, 2026

    53.7 °F

  • Average September

    67.5 °F

  • Highest 9 September, 2026

    96.7 °F

Climate (2021–2026)

Oakland, Metro Oakland International Airport (12.4 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    67.2 °F
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