Effigy Mounds National Monument Weather Forecast

    • 60
    • 80

    Chance Thunderstorms

    • 57
    • 79

    Partly Sunny

    • 60
    • 80

    Mostly Sunny

    • 61
    • 80

    Chance Rain Showers

    • 57
    • 78

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

Today 18 Aug Clayton

Mostly cloudy in the Morning, then becoming partly sunny. A chance of Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Aug Clayton

Partly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 60s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Real-Time

Effigy Mounds National Monument Temperature Statistics

August Temperature

Prairie Du Chien Municipal Airport (5.6 miles)

  • Lowest 3 August, 2026

    59 °F

  • Average August

    72 °F

  • Highest 10 August, 2026

    85.3 °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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