Pere Marquette State Park Weather Forecast

    • 75
    • 91

    Chance Thunderstorms

    • 75
    • 92

    Chance Thunderstorms

    • 73
    • 91

    Slight Chance Thunderstorms

    • 77
    • 94

    Partly Sunny

    • 70
    • 95

    Partly Sunny

    • 66
    • 85

    Mostly Sunny

    • 67
    • 85

    Partly Sunny

Today 17 Jul Jersey

Sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 80s. West Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 100.

Tonight 17 Jul Jersey

Mostly clear. Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Pere Marquette State Park Temperature Statistics

July Temperature

St. Charles, St. Charles County Smartt Airport (5 miles)

  • Lowest 13 July, 2026

    66 °F

  • Average July

    80.8 °F

  • Highest 2 July, 2026

    97.6 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (5 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.9 °F
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