Effigy Mounds National Monument Weather Forecast

    • 68
    • 84

    Rain Showers

    • 57
    • 83

    Partly Sunny

    • 55
    • 79

    Mostly Sunny

    • 62
    • 82

    Partly Sunny

    • 56
    • 81

    Chance Rain Showers

    • 57
    • 77

    Chance Thunderstorms

Today 8 Sep Clayton

Partly sunny with a slight chance of Thunderstorms. A chance of Showers in the Morning, then a slight chance of Showers in the afternoon. Humid with Highs in the mid 80s. South Winds 10 to 15 Mph. Chance of rain 50 percent.

Tonight 8 Sep Clayton

Mostly cloudy. Near steady temperature in the mid 60s. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Effigy Mounds National Monument Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 5 September, 2026

    67.1 °F

  • Average September

    76.3 °F

  • Highest 4 September, 2026

    90.7 °F

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

    50 °F

  • Average High 2021–2026

    59.5 °F
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