Harpers Ferry Weather Forecast

    • 44
    • 65

    Chance Rain Showers

    • 48
    • 66

    Rain Showers

    • 44
    • 63

    Partly Sunny

    • 43
    • 66

    Mostly Sunny

    • 46
    • 68

    Mostly Sunny

    • 54
    • 73

    Chance Rain Showers

Today 3 Sep Allamakee

Cloudy with Showers likely with a chance of Thunderstorms this Morning, then partly sunny this afternoon. Cooler with Highs in the mid 60s. Northwest Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 3 Sep Allamakee

Mostly cloudy with a slight chance of rain Showers in the Evening, then partly cloudy after midnight. Much Colder with Lows in the lower 40s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harpers Ferry Temperature Statistics

September Temperature

Prairie Du Chien Municipal Airport (12.4 miles)

  • Lowest 1 September, 2025

    50.5 °F

  • Average September

    62.3 °F

  • Highest 1 September, 2025

    76.5 °F

Climate (2020–Present)

Prairie Du Chien Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    40.2 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    59 °F
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