San Joaquin River - Headreach Island Weather Forecast

    • 47
    • 62

    Rain Showers

    • 45
    • 66

    Chance Rain

    • 46
    • 72

    Mostly Sunny

    • 49
    • 75

    Partly Sunny

    • 50
    • 72

    Partly Sunny

    • 49
    • 72

    Partly Sunny

Today 21 Apr Carquinez Strait and Delta

Mostly cloudy with rain Showers likely and a slight chance of Thunderstorms. Highs 62 to 68.

Tonight 21 Apr Carquinez Strait and Delta

Mostly cloudy with a chance of rain. Lows around 49.

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San Joaquin River - Headreach Island Temperature Statistics

April Temperature

Stockton, Stockton Metropolitan Airport (16.8 miles)

  • Lowest 3 April, 2026

    39.7 °F

  • Average April

    61.6 °F

  • Highest 5 April, 2026

    86.6 °F

Climate (2021–Present)

Stockton, Stockton Metropolitan Airport (16.8 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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