Prospect Slough - French Island Weather Forecast

    • 41
    • 60

    Mostly Cloudy

    • 43
    • 60

    Mostly Cloudy

    • 44
    • 60

    Mostly Cloudy

    • 42
    • 61

    Partly Sunny

    • 42
    • 61

    Partly Sunny

    • 43
    • 62

    Partly Sunny

Today 30 Jan Carquinez Strait and Delta

Mostly cloudy. Areas of fog in the Morning, then patchy dense fog in the afternoon. Highs around 59. Northeast Winds up to 10 Mph.

Tonight 30 Jan Carquinez Strait and Delta

Mostly cloudy. Lows around 42. Northeast Winds up to 10 Mph.

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Prospect Slough - French Island Temperature Statistics

January Temperature

Fairfield / Travis Air Force Base (13.7 miles)

  • Lowest 14 January, 2026

    32.7 °F

  • Average January

    47.8 °F

  • Highest 24 January, 2026

    65.8 °F

Climate (2021–Present)

Fairfield / Travis Air Force Base (13.7 miles)

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  • Average Low 2021–2026

    48.7 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    74.9 °F
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