Lake Koshkonong Weather Forecast

    • 40
    • 67

    Mostly Sunny

    • 33
    • 60

    Rain

    • 26
    • 40

    Rain/Snow Likely

    • 33
    • 44

    Mostly Cloudy

    • 25
    • 44

    Chance Snow

    • 28
    • 42

    Rain/Snow Likely

Today 9 Mar Jefferson

Sunny. Highs in the upper 60s. Southwest Winds 5 to 15 Mph.

Tonight 9 Mar Jefferson

Mostly clear. Lows around 40. East Winds up to 10 Mph.

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Lake Koshkonong Temperature Statistics

March Temperature

Watertown (20.5 miles)

  • Lowest 1 March, 2026

    7.2 °F

  • Average March

    35.8 °F

  • Highest 6 March, 2026

    58.6 °F

Climate (2021–Present)

Watertown (20.5 miles)

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  • Average Low 2021–2026

    35.8 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    54.7 °F
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