San Joaquin River - Three River Reach Weather Forecast

    • 70
    • 83

    Partly Sunny

    • 74
    • 88

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 61
    • 77

    Sunny

    • 60
    • 78

    Sunny

    • 60
    • 78

    Mostly Sunny

Today 8 Sep San Joaquin County Delta

Sunny. Highs 90 to 95. Northwest Winds up to 10 Mph.

Tonight 8 Sep San Joaquin County Delta

Partly cloudy. Lows around 68. Northwest Winds up to 10 Mph.

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San Joaquin River - Three River Reach Temperature Statistics

September Temperature

Stockton, Stockton Metropolitan Airport (19.3 miles)

  • Lowest 1 September, 2026

    52.6 °F

  • Average September

    69.4 °F

  • Highest 3 September, 2026

    85.6 °F

Climate (2021–2026)

Stockton, Stockton Metropolitan Airport (19.3 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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