Grant County Fairgrounds Weather Forecast

    • 68
    • 78

    Mostly Cloudy

    • 72
    • 86

    Chance Thunderstorms

    • 72
    • 87

    Chance Thunderstorms

    • 72
    • 89

    Slight Chance Thunderstorms

    • 68
    • 88

    Chance Rain Showers

    • 66
    • 84

    Chance Thunderstorms

    • 66
    • 84

    Slight Chance Thunderstorms

Today 29 Aug Grant

Partly sunny with a 50 percent chance of Showers. Highs in the upper 70s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 29 Aug Grant

Partly cloudy this Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the upper 60s. South Winds 10 to 15 Mph. Chance of rain 20 percent.

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Grant County Fairgrounds Temperature Statistics

August Temperature

Platteville Municipal Airport (16.8 miles)

  • Lowest 23 August, 2026

    53.1 °F

  • Average August

    72.3 °F

  • Highest 10 August, 2026

    84.2 °F

Climate (2021–2026)

Platteville Municipal Airport (16.8 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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