Lake Wausau Weather Forecast

    • 45
    • 67

    Mostly Cloudy

    • 41
    • 63

    Mostly Cloudy

    • 41
    • 65

    Mostly Sunny

    • 43
    • 67

    Mostly Sunny

    • 46
    • 68

    Areas Fog

    • 46
    • 70

    Areas Fog

    • 49
    • 71

    Mostly Cloudy

Today 20 Sep Marathon

Partly sunny. Highs in the lower 70s.

Tonight 20 Sep Marathon

Mostly cloudy. Lows in the lower 40s. Northeast wind 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Wausau Temperature Statistics

September Temperature

Wausau Downtown Airport (0.6 miles)

  • Lowest 14 September, 2026

    40.6 °F

  • Average September

    66.8 °F

  • Highest 1 September, 2026

    89.7 °F

Climate (2021–2026)

Wausau Downtown Airport (0.6 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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