Caswell Memorial State Park Weather Forecast

    • 57
    • 81

    Sunny

    • 57
    • 89

    Sunny

    • 60
    • 91

    Sunny

    • 61
    • 91

    Mostly Sunny

    • 62
    • 92

    Mostly Sunny

    • 62
    • 93

    Sunny

    • 61
    • 92

    Sunny

Today 28 Sep Central San Joaquin County Including Stockton Metro

Sunny. Highs around 83. Northwest Winds up to 15 Mph. Gusts up to 25 Mph in the afternoon.

Tonight 28 Sep Central San Joaquin County Including Stockton Metro

Clear. Lows 53 to 58. Northwest Winds up to 10 Mph with Gusts to around 20 Mph.

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Caswell Memorial State Park Temperature Statistics

September Temperature

Modesto City-County Airport - Harry Sham Field (13 miles)

  • Lowest 17 September, 2026

    52.6 °F

  • Average September

    74 °F

  • Highest 10 September, 2026

    105.7 °F

Climate (2021–2026)

Modesto City-County Airport - Harry Sham Field (13 miles)

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  • Average Low 2021–2026

    51.8 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    76.3 °F
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