Isle of Ferns Park Weather Forecast

    • 60
    • 72

    Cloudy

    • 42
    • 69

    Slight Chance Rain Showers

    • 38
    • 64

    Mostly Sunny

    • 45
    • 64

    Slight Chance Rain Showers

    • 35
    • 67

    Mostly Sunny

    • 37
    • 61

    Mostly Sunny

    • 48
    • 65

    Partly Sunny

Today 30 Sep Marathon

Mostly sunny. Highs in the upper 60s.

Tonight 30 Sep Marathon

Cloudy. Patchy fog in the Evening, then Areas of fog after midnight. Nearly steady temperature in the lower 60s. Light and variable wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle of Ferns Park Temperature Statistics

September Temperature

Wausau Downtown Airport (1.2 miles)

  • Lowest 14 September, 2026

    40.6 °F

  • Average September

    63.7 °F

  • Highest 1 September, 2026

    89.7 °F

Climate (2021–2026)

Wausau Downtown Airport (1.2 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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