Effigy Mounds National Monument Weather Forecast

    • 70
    • 92

    Slight Chance Thunderstorms

    • 70
    • 92

    Partly Sunny

    • 72
    • 90

    Rain Showers Likely

    • 69
    • 91

    Slight Chance Thunderstorms

    • 66
    • 87

    Slight Chance Thunderstorms

    • 64
    • 85

    Partly Sunny

Today 1 Sep Clayton

Partly sunny with a slight chance of Showers and Thunderstorms. Hot with Highs in the lower 90s. Southwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 100 this afternoon.

Tonight 1 Sep Clayton

Partly cloudy. A slight chance of Showers in the evening. Humid with Lows around 70. Light Winds. Chance of rain 20 percent. Heat index Values in the mid 90s early in the evening.

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Effigy Mounds National Monument Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

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  • Average September

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Climate (2021–2026)

Prairie Du Chien Municipal Airport (5.6 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    59.5 °F
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