Grant River Recreation Area Weather Forecast

    • 66
    • 71

    Rain Showers

    • 56
    • 75

    Rain Showers Likely

    • 61
    • 69

    Rain Showers

    • 61
    • 76

    Chance Rain Showers

    • 63
    • 77

    Rain Showers Likely

    • 58
    • 75

    Chance Rain Showers

Today 14 Sep Grant

Partly sunny this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs around 70. Southeast Winds 10 to 20 Mph. Gusts up to 30 Mph this afternoon. Chance of rain 50 percent.

Tonight 14 Sep Grant

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Locally heavy rainfall possible after midnight. Not as cool with Lows in the mid 60s. South Winds 10 to 20 Mph with Gusts up to 35 Mph. Chance of rain 100 percent.

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Grant River Recreation Area Temperature Statistics

September Temperature

Platteville Municipal Airport (13 miles)

  • Lowest 11 September, 2026

    56.7 °F

  • Average September

    75 °F

  • Highest 4 September, 2026

    91.6 °F

Climate (2021–2026)

Platteville Municipal Airport (13 miles)

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  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    58.8 °F
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