Grant River Recreation Area Weather Forecast

    • 61
    • 85

    Partly Sunny

    • 62
    • 85

    Partly Sunny

    • 60
    • 78

    Chance Thunderstorms

    • 62
    • 79

    Chance Thunderstorms

    • 62
    • 78

    Chance Rain Showers

    • 59
    • 79

    Chance Thunderstorms

Today 17 Sep Grant

Mostly sunny. Highs in the mid 80s. South Winds around 5 Mph.

Tonight 17 Sep Grant

Mostly cloudy. Lows in the lower 60s. Light Winds.

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Grant River Recreation Area Temperature Statistics

September Temperature

Platteville Municipal Airport (13 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    62.7 °F

  • Highest 14 September, 2025

    85.1 °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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