Chestnut Mountain Ski Resort Weather Forecast

    • 60
    • 86

    Mostly Sunny

    • 59
    • 86

    Partly Sunny

    • 62
    • 87

    Mostly Cloudy

    • 61
    • 80

    Chance Thunderstorms

    • 61
    • 80

    Chance Rain Showers

    • 62
    • 81

    Slight Chance Thunderstorms

Today 16 Sep Jo Daviess

Sunny. Highs in the mid 80s. Southeast Winds around 5 Mph.

Tonight 16 Sep Jo Daviess

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 50s. East Winds around 5 Mph.

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Chestnut Mountain Ski Resort Temperature Statistics

September Temperature

Dubuque Regional Airport (16.8 miles)

  • Lowest 7 September, 2025

    39.9 °F

  • Average September

    62.8 °F

  • Highest 14 September, 2025

    87.1 °F

Climate (2020–Present)

Dubuque Regional Airport (16.8 miles)

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  • Average Low 2020–2025

    40.3 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    58.9 °F
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