Lake Koshkonong Weather Forecast

    • 25
    • 47

    Becoming Sunny

    • 30
    • 49

    Partly Sunny

    • 35
    • 54

    Mostly Sunny

    • 43
    • 54

    Rain

    • 30
    • 52

    Chance Rain

    • 21
    • 38

    Mostly Cloudy

Today 21 Nov Jefferson

Partly sunny. Highs in the mid 40s. Northwest Winds up to 5 Mph.

Tonight 21 Nov Jefferson

Partly cloudy. Lows in the mid 20s. Northwest Winds up to 5 Mph through around midnight becoming calm.

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Lake Koshkonong Temperature Statistics

November Temperature

Watertown (20.5 miles)

  • Lowest 10 November, 2025

    19.6 °F

  • Average November

    41.4 °F

  • Highest 15 November, 2025

    66.7 °F

Climate (2020–Present)

Watertown (20.5 miles)

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  • Average Low 2020–2025

    35.8 °F

  • Average 2020–2025

    45.6 °F

  • Average High 2020–2025

    54.6 °F
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