Old River - Eucalyptus Island Weather Forecast

    • 52
    • 77

    Gradual Clearing

    • 56
    • 83

    Sunny

    • 60
    • 92

    Sunny

    • 61
    • 93

    Sunny

    • 60
    • 91

    Mostly Sunny

    • 60
    • 91

    Mostly Sunny

Today 27 Sep East Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Highs in the 70s. Southwest Winds 5 to 15 Mph.

Tonight 27 Sep East Bay Interior Valleys

Partly cloudy. Lows in the lower 50s. Southwest Winds 5 to 15 Mph.

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Old River - Eucalyptus Island Temperature Statistics

September Temperature

Livermore, Livermore Municipal Airport (17.4 miles)

  • Lowest 5 September, 2026

    50.6 °F

  • Average September

    69.8 °F

  • Highest 9 September, 2026

    104.6 °F

Climate (2021–2026)

Livermore, Livermore Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    49 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    74 °F
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