Lake Mills Weather Forecast

    • 69
    • 80

    Rain Showers Likely

    • 58
    • 81

    Chance Rain Showers

    • 53
    • 76

    Mostly Sunny

    • 61
    • 79

    Chance Rain Showers

    • 57
    • 80

    Chance Thunderstorms

    • 56
    • 74

    Chance Rain Showers

    • 59
    • 76

    Rain Showers Likely

Today 8 Sep Jefferson

Mostly cloudy with chance of light Showers and slight chance of Thunderstorms. South Winds 10 to 15 Mph. Chance of precipitation 40 percent.

Tonight 8 Sep Jefferson

Cloudy. Chance of light Showers and slight chance of Thunderstorms through around Midnight, then Showers likely and slight chance of Thunderstorms after midnight. Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mills Temperature Statistics

September Temperature

Watertown (11.2 miles)

  • Lowest 6 September, 2026

    57.9 °F

  • Average September

    73.5 °F

  • Highest 1 September, 2026

    87.3 °F

Climate (2021–2026)

Watertown (11.2 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    53.9 °F
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