Rib Mountain State Park Weather Forecast

    • 59
    • 81

    Mostly Sunny

    • 60
    • 82

    Partly Sunny

    • 59
    • 82

    Slight Chance Thunderstorms

    • 55
    • 77

    Chance Thunderstorms

    • 52
    • 70

    Slight Chance Thunderstorms

    • 54
    • 71

    Chance Rain Showers

Today 15 Sep Marathon

Sunny. Highs in the lower 80s. Southeast wind 5 to 10 Mph.

Tonight 15 Sep Marathon

Mostly clear. Lows in the upper 50s. Southeast wind 5 to 10 Mph.

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Rib Mountain State Park Temperature Statistics

September Temperature

Wausau Downtown Airport (3.1 miles)

  • Lowest 8 September, 2025

    39 °F

  • Average September

    58.3 °F

  • Highest 13 September, 2025

    79 °F

Climate (2020–Present)

Wausau Downtown Airport (3.1 miles)

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  • Average Low 2020–2025

    37.5 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    55.8 °F
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