Grant River Recreation Area Weather Forecast

    • 61
    • 79

    Partly Sunny

    • 63
    • 80

    Chance Thunderstorms

    • 54
    • 76

    Mostly Sunny

    • 50
    • 68

    Mostly Sunny

    • 47
    • 67

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

Today 21 Aug Grant

Patchy fog after midnight. Areas of fog this morning. Partly cloudy. Highs in the upper 70s. Light Winds.

Tonight 21 Aug Grant

Partly cloudy. Patchy fog after midnight. Lows in the lower 60s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Grant River Recreation Area Temperature Statistics

August Temperature

Platteville Municipal Airport (13 miles)

  • Lowest 1 August, 2025

    52 °F

  • Average August

    73 °F

  • Highest 9 August, 2025

    87.6 °F

Climate (2020–Present)

Platteville Municipal Airport (13 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    49.7 °F

  • Average High 2020–2025

    58.5 °F
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