San Joaquin River - Headreach Island Weather Forecast

    • 56
    • 86

    Sunny

    • 55
    • 82

    Sunny

    • 56
    • 89

    Sunny

    • 56
    • 90

    Sunny

    • 56
    • 88

    Sunny

    • 56
    • 89

    Mostly Sunny

Today 12 Sep San Joaquin County Delta

Sunny. Highs 82 to 87. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

Tonight 12 Sep San Joaquin County Delta

Clear. Lows around 56. West Winds 10 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Joaquin River - Headreach Island Temperature Statistics

September Temperature

Stockton, Stockton Metropolitan Airport (16.8 miles)

  • Lowest 1 September, 2026

    52.6 °F

  • Average September

    73.8 °F

  • Highest 10 September, 2026

    104 °F

Climate (2021–2026)

Stockton, Stockton Metropolitan Airport (16.8 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    63.1 °F

  • Average High 2021–2026

    77.4 °F
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