Jackson Triangle Weather Forecast

    • 42
    • 61

    Mostly Sunny

    • 46
    • 63

    Mostly Sunny

    • 48
    • 63

    Partly Sunny

    • 47
    • 63

    Partly Sunny

    • 47
    • 64

    Partly Sunny

    • 48
    • 65

    Partly Sunny

    • 49
    • 66

    Partly Sunny

Today 4 Dec San Francisco Bay Shoreline

Partly cloudy late in the morning then becoming sunny. Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 4 Dec San Francisco Bay Shoreline

Mostly clear. Lows in the mid 40s. Northwest Winds up to 5 Mph.

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Jackson Triangle Temperature Statistics

December Temperature

Hayward, Hayward Air Terminal (1.9 miles)

  • Lowest 1 December, 2025

    43 °F

  • Average December

    49.2 °F

  • Highest 2 December, 2025

    60.1 °F

Climate (2020–Present)

Hayward, Hayward Air Terminal (1.9 miles)

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  • Average Low 2020–2025

    52.1 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    68.8 °F
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