San Joaquin River - Fern Island Weather Forecast

    • 44
    • 59

    Chance Rain

    • 45
    • 66

    Mostly Sunny

    • 44
    • 69

    Mostly Sunny

    • 48
    • 69

    Partly Sunny

    • 45
    • 69

    Sunny

    • 44
    • 75

    Mostly Sunny

    • 49
    • 79

    Partly Sunny

Today 12 Apr Carquinez Strait and Delta

A slight chance of Thunderstorms early in the morning. A chance of rain Showers in the morning. A chance of Thunderstorms in the late morning and afternoon. Rain Showers early in the Afternoon, then a chance of rain Showers late in the afternoon. Highs 55 to 61. South Winds 10 to 20 Mph with Gusts to around 30 Mph.

Tonight 12 Apr Carquinez Strait and Delta

Mostly cloudy with a chance of rain Showers and a slight chance of Thunderstorms early in the Evening, then mostly cloudy with a chance of rain late in the evening. Partly cloudy after midnight. Lows around 44. Southwest Winds up to 15 Mph.

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San Joaquin River - Fern Island Temperature Statistics

April Temperature

Stockton, Stockton Metropolitan Airport (17.4 miles)

  • Lowest 3 April, 2026

    39.7 °F

  • Average April

    63 °F

  • Highest 5 April, 2026

    86.6 °F

Climate (2021–Present)

Stockton, Stockton Metropolitan Airport (17.4 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    63 °F

  • Average High 2021–2026

    77.3 °F
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