Rib Mountain State Park Weather Forecast

    • 51
    • 75

    Partly Sunny

    • 59
    • 72

    Rain Showers

    • 59
    • 70

    Rain Showers

    • 41
    • 67

    Slight Chance Rain Showers

    • 41
    • 64

    Mostly Sunny

    • 44
    • 64

    Partly Sunny

    • 37
    • 62

    Partly Sunny

Today 28 Sep Marathon

Partly cloudy. Temperatures in the lower 70s. Light and variable wind.

Tonight 28 Sep Marathon

Mostly clear. Lows in the lower 50s. Light and variable wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rib Mountain State Park Temperature Statistics

September Temperature

Wausau Downtown Airport (3.1 miles)

  • Lowest 14 September, 2026

    40.6 °F

  • Average September

    63.9 °F

  • Highest 1 September, 2026

    89.7 °F

Climate (2021–2026)

Wausau Downtown Airport (3.1 miles)

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  • Average Low 2021–2026

    37.4 °F

  • Average 2021–2026

    46.8 °F

  • Average High 2021–2026

    56 °F
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