Lake Mendota Weather Forecast

    • 27
    • 46

    Partly Sunny

    • 31
    • 40

    Chance Rain

    • 32
    • 38

    Rain Likely

    • 36
    • 45

    Slight Chance Rain

    • 21
    • 46

    Mostly Cloudy

    • 7
    • 28

    Blustery

    • 10
    • 19

    Partly Sunny

Today 23 Dec Dane

Mostly sunny. Northwest Winds 5 to 10 Mph.

Tonight 23 Dec Dane

Partly cloudy through around midnight then becoming mostly cloudy. Lows in the upper 20s. Northwest Winds up to 10 Mph shifting to the northeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mendota Temperature Statistics

December Temperature

Madison, Dane County Regional-Truax Field (4.3 miles)

  • Lowest 14 December, 2025

    -7.1 °F

  • Average December

    18.9 °F

  • Highest 18 December, 2025

    42.1 °F

Climate (2020–Present)

Madison, Dane County Regional-Truax Field (4.3 miles)

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    49.6 °F

  • Average High 2020–2025

    58.8 °F
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