Grass Lake Weather Forecast

    • 25
    • 29

    Gradual Clearing

    • 31
    • 40

    Chance Snow

    • 28
    • 41

    Chance Rain

    • 34
    • 45

    Partly Sunny

    • 31
    • 45

    Chance Rain

    • 26
    • 39

    Chance Snow

    • 16
    • 32

    Chance Snow

Today 4 Jan Dane

Cloudy with chance of light freezing Rain, snow and sleet. South Winds 10 to 15 Mph. Chance of precipitation 30 percent.

Tonight 4 Jan Dane

Not as cold. Cloudy with a 30 percent chance of light freezing rain in the Evening, then partly cloudy in the late evening and overnight. Patchy fog and freezing fog early in the morning. Near steady temperature in the upper 20s. South Winds 5 to 15 Mph. Gusts up to 30 Mph through around midnight.

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Grass Lake Temperature Statistics

January Temperature

Madison, Dane County Regional-Truax Field (17.4 miles)

  • Lowest 1 January, 2026

    6.1 °F

  • Average January

    13.2 °F

  • Highest 2 January, 2026

    19 °F

Climate (2021–Present)

Madison, Dane County Regional-Truax Field (17.4 miles)

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  • Average Low 2021–2026

    39.9 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    58.8 °F
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