Lake Koshkonong Weather Forecast

    • 34
    • 52

    Increasing Clouds

    • 38
    • 53

    Mostly Cloudy

    • 42
    • 59

    Partly Sunny

    • 41
    • 57

    Mostly Cloudy

    • 42
    • 57

    Chance Rain Showers

    • 39
    • 54

    Slight Chance Rain Showers

Today 24 Oct Jefferson

Sunny. Widespread frost in the morning. Highs in the lower 50s. Northwest Winds up to 5 Mph.

Tonight 24 Oct Jefferson

Partly cloudy. Widespread frost in the late evening and overnight. Lows in the lower 30s. Calm Winds becoming southeast up to 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Koshkonong Temperature Statistics

October Temperature

Watertown (20.5 miles)

  • Lowest 20 October, 2025

    32.7 °F

  • Average October

    57.9 °F

  • Highest 3 October, 2025

    86.4 °F

Climate (2020–Present)

Watertown (20.5 miles)

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  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    45.6 °F

  • Average High 2020–2025

    54.6 °F
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