Lake Winnebago Weather Forecast

    • 59
    • 65

    Rain Showers

    • 57
    • 64

    Rain Showers

    • 54
    • 65

    Breezy

    • 50
    • 60

    Mostly Cloudy

    • 50
    • 60

    Partly Sunny

    • 53
    • 63

    Partly Sunny

    • 54
    • 67

    Partly Sunny

Today 18 Sep Calumet

Mostly clear. Lows in the lower 50s. Highs around 70.

Tonight 18 Sep Calumet

Showers in the Evening, then Showers and a chance of Thunderstorms after midnight. Nearly steady temperature in the upper 50s. East wind 10 to 15 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Winnebago Temperature Statistics

September Temperature

Appleton-Outagamie (13 miles)

  • Lowest 14 September, 2026

    48.2 °F

  • Average September

    68.8 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Appleton-Outagamie (13 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    47.1 °F

  • Average High 2021–2026

    56.9 °F
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