Upper Bal Weather Forecast

    • 59
    • 76

    Becoming Sunny

    • 57
    • 72

    Partly Sunny

    • 58
    • 75

    Mostly Sunny

    • 58
    • 77

    Partly Sunny

    • 58
    • 73

    Partly Sunny

    • 58
    • 72

    Partly Sunny

Today 11 Sep San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. West Winds 10 to 20 Mph.

Tonight 11 Sep San Francisco Bay Shoreline

Partly cloudy. Lows in the lower 60s. West Winds 5 to 10 Mph.

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Upper Bal Temperature Statistics

September Temperature

Hayward, Hayward Air Terminal (3.1 miles)

  • Lowest 7 September, 2026

    55.7 °F

  • Average September

    69.4 °F

  • Highest 9 September, 2026

    97 °F

Climate (2021–2026)

Hayward, Hayward Air Terminal (3.1 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    59.8 °F

  • Average High 2021–2026

    69.2 °F
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