Lake Mills Weather Forecast

    • 61
    • 79

    Chance Thunderstorms

    • 58
    • 73

    Rain Showers Likely

    • 59
    • 74

    Chance Thunderstorms

    • 59
    • 80

    Chance Thunderstorms

    • 55
    • 79

    Slight Chance Thunderstorms

    • 53
    • 75

    Mostly Sunny

Today 18 Sep Winnebago

Partly sunny. A slight chance of Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Humid with Highs around 80. South Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 18 Sep Winnebago

Mostly cloudy with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mills Temperature Statistics

September Temperature

Forest City Municipal Airport (13 miles)

  • Lowest 7 September, 2025

    35.6 °F

  • Average September

    62.7 °F

  • Highest 13 September, 2025

    91.4 °F

Climate (2020–Present)

Forest City Municipal Airport (13 miles)

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  • Average Low 2020–2025

    36.6 °F

  • Average 2020–2025

    47.2 °F

  • Average High 2020–2025

    57.2 °F
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