Effigy Mounds National Monument Weather Forecast

    • 61
    • 85

    Rain Showers Likely

    • 60
    • 77

    Rain Showers Likely

    • 60
    • 77

    Chance Rain Showers

    • 59
    • 76

    Chance Rain Showers

    • 59
    • 79

    Chance Rain Showers

    • 57
    • 78

    Slight Chance Rain Showers

    • 55
    • 76

    Mostly Sunny

Today 18 Sep Clayton

Partly sunny with a chance of Showers with a slight chance of Thunderstorms. Near steady temperature in the lower 80s. Light Winds. Chance of rain 50 percent.

Tonight 18 Sep Clayton

Mostly cloudy with a chance of Showers and Thunderstorms. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Effigy Mounds National Monument Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 7 September, 2025

    40.1 °F

  • Average September

    64.2 °F

  • Highest 16 September, 2025

    87.4 °F

Climate (2020–Present)

Prairie Du Chien Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    40.2 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    59.1 °F
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