Harpers Ferry Weather Forecast

    • 70
    • 92

    Chance Thunderstorms

    • 70
    • 89

    Rain Showers Likely

    • 69
    • 91

    Chance Rain Showers

    • 67
    • 89

    Chance Thunderstorms

    • 66
    • 87

    Chance Rain Showers

    • 65
    • 84

    Chance Rain Showers

    • 66
    • 84

    Chance Rain Showers

Today 2 Sep Allamakee

Mostly sunny. Hot with Highs around 90. Southwest Winds around 5 Mph.

Tonight 2 Sep Allamakee

Partly cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the upper 60s. Light and variable Winds. Chance of rain 20 percent. Heat index Values in the mid 90s early this evening.

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Harpers Ferry Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (12.4 miles)

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Climate (2021–2026)

Prairie Du Chien Municipal Airport (12.4 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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