South San Francisco Weather Forecast

    • 45
    • 58

    Decreasing Clouds

    • 47
    • 62

    Mostly Sunny

    • 48
    • 62

    Partly Sunny

    • 49
    • 65

    Mostly Sunny

    • 48
    • 66

    Mostly Sunny

    • 47
    • 65

    Mostly Sunny

    • 49
    • 64

    Mostly Sunny

Today 7 Dec San Francisco Bay Shoreline

Partly cloudy. Highs in the upper 50s. Northwest Winds around 5 Mph.

Tonight 7 Dec San Francisco Bay Shoreline

Mostly clear except patchy fog after midnight. Lows in the mid 40s. North Winds up to 5 Mph.

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South San Francisco Temperature Statistics

December Temperature

San Francisco, San Francisco International Airport (3.1 miles)

  • Lowest 2 December, 2025

    45 °F

  • Average December

    51.4 °F

  • Highest 3 December, 2025

    63 °F

Climate (2020–Present)

San Francisco, San Francisco International Airport (3.1 miles)

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  • Average Low 2020–2025

    52.4 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    66.5 °F
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