Old River - Widdows Island Weather Forecast

    • 66
    • 91

    Chance Rain Showers

    • 63
    • 84

    Chance Rain Showers

    • 63
    • 89

    Mostly Sunny

    • 64
    • 91

    Sunny

    • 66
    • 95

    Mostly Sunny

    • 64
    • 88

    Chance Rain Showers

Today 18 Sep Carquinez Strait and Delta

Mostly cloudy. Highs 82 to 88. Southwest Winds 10 to 15 Mph.

Tonight 18 Sep Carquinez Strait and Delta

Mostly cloudy with a slight chance of rain Showers. Lows 61 to 67. Southwest Winds up to 10 Mph with Gusts to around 20 Mph.

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Old River - Widdows Island Temperature Statistics

September Temperature

Livermore, Livermore Municipal Airport (17.4 miles)

  • Lowest 15 September, 2025

    57 °F

  • Average September

    69 °F

  • Highest 1 September, 2025

    100.9 °F

Climate (2020–Present)

Livermore, Livermore Municipal Airport (17.4 miles)

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  • Average Low 2020–2025

    48.7 °F

  • Average 2020–2025

    60.6 °F

  • Average High 2020–2025

    74.2 °F
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