Grant River Recreation Area Weather Forecast

    • 72
    • 89

    Slight Chance Thunderstorms

    • 72
    • 88

    Slight Chance Thunderstorms

    • 70
    • 89

    Chance Thunderstorms

    • 69
    • 86

    Chance Rain Showers

    • 67
    • 87

    Slight Chance Thunderstorms

    • 65
    • 86

    Slight Chance Thunderstorms

Today 31 Aug Grant

Mostly sunny. A slight chance of Showers and Thunderstorms this afternoon. Warmer with Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 100 this afternoon.

Tonight 31 Aug Grant

Partly cloudy. A slight chance of Showers in the evening. Humid with Lows in the lower 70s. South Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 20 percent. Heat index Values in the mid 90s early in the evening.

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Grant River Recreation Area Temperature Statistics

August Temperature

Platteville Municipal Airport (13 miles)

  • Lowest 23 August, 2026

    53.1 °F

  • Average August

    72.2 °F

  • Highest 10 August, 2026

    84.2 °F

Climate (2021–2026)

Platteville Municipal Airport (13 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    58.7 °F
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