Prospect Slough - French Island Weather Forecast

    • 61
    • 92

    Sunny

    • 60
    • 91

    Sunny

    • 59
    • 90

    Mostly Sunny

    • 59
    • 87

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 60
    • 87

    Mostly Sunny

    • 59
    • 87

    Mostly Sunny

Today 24 Sep Carquinez Strait and Delta

Sunny. Highs 88 to 94. Northwest Winds around 10 Mph.

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Prospect Slough - French Island Temperature Statistics

September Temperature

Fairfield / Travis Air Force Base (13.7 miles)

  • Lowest 22 September, 2022

    54.1 °F
  • Average September

    74.5 °F
  • Highest 5 September, 2022

    115.5 °F

Climate (2010–Present)

Fairfield / Travis Air Force Base (13.7 miles)

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  • Average Low 2010–Present

    49.1 °F
  • Average 2010–Present

    61.6 °F
  • Average High 2010–Present

    77.6 °F
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