Grass Lake Weather Forecast

    • 70
    • 91

    Rain Showers Likely

    • 70
    • 90

    Rain Showers Likely

    • 63
    • 82

    Chance Thunderstorms

    • 63
    • 84

    Partly Sunny

    • 64
    • 85

    Mostly Cloudy

    • 62
    • 84

    Chance Rain Showers

Today 4 Jul Dane

Warm and humid. Partly sunny. Showers likely and chance of Thunderstorms in the Morning, then chance of light Showers and Thunderstorms late in the morning. Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of precipitation 70 percent. Highest heat index Readings 96 to 101 in the afternoon.

Tonight 4 Jul Dane

Mostly cloudy. Chance of Showers and Thunderstorms after Midnight, then Showers and Thunderstorms likely early in the morning. Near steady temperature in the lower 70s. Southeast Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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Grass Lake Temperature Statistics

July Temperature

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

  • Lowest 1 July, 2025

    63 °F

  • Average July

    73.3 °F

  • Highest 1 July, 2025

    82 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    49.5 °F

  • Average High 2020–2025

    58.7 °F
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