San Francisco Bay - Red Rock Island Weather Forecast

    • 46
    • 53

    Mostly Sunny

    • 47
    • 54

    Partly Sunny

    • 53
    • 56

    Mostly Cloudy

    • 55
    • 58

    Rain Likely

    • 51
    • 56

    Chance Rain

    • 54
    • 56

    Chance Rain

Today 13 Dec San Francisco Bay Shoreline

Sunny. Highs in the lower 60s. Northwest Winds 5 to 10 Mph.

Tonight 13 Dec San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Patchy fog in the Evening, then Areas of fog after midnight. Lows in the mid 40s. Northwest Winds around 5 Mph.

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San Francisco Bay - Red Rock Island Temperature Statistics

December Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    46.2 °F

  • Highest 3 December, 2025

    71.6 °F

Climate (2020–Present)

Novato / Gnoss Field (16.2 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    57.4 °F

  • Average High 2020–2025

    72.3 °F
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