Prospect Slough - French Island Weather Forecast

    • 52
    • 58

    Rain

    • 48
    • 54

    Rain

    • 47
    • 51

    Rain

    • 44
    • 52

    Mostly Cloudy

    • 38
    • 52

    Slight Chance Rain

    • 35
    • 49

    Mostly Sunny

Today 3 Jan Carquinez Strait and Delta

Breezy. A chance of rain Showers early in the morning. A slight chance of Thunderstorms through the day. Rain Showers in the late morning and early Afternoon, then a chance of rain Showers late in the afternoon. Highs 56 to 61. South Winds 15 to 25 Mph with Gusts to around 35 Mph.

Tonight 3 Jan Carquinez Strait and Delta

A chance of rain in the Evening, then rain Showers and a slight chance of Thunderstorms after midnight. Lows around 52. South Winds 10 to 20 Mph with Gusts to around 35 Mph.

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Prospect Slough - French Island Temperature Statistics

January Temperature

Fairfield / Travis Air Force Base (13.7 miles)

  • Lowest 1 January, 2026

    47.3 °F

  • Average January

    51.9 °F

  • Highest 1 January, 2026

    57.6 °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

    60.5 °F

  • Average High 2021–2026

    75 °F
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