Grant County Fairgrounds Weather Forecast

    • 44
    • 66

    Mostly Sunny

    • 55
    • 72

    Increasing Clouds

    • 55
    • 74

    Slight Chance Thunderstorms

    • 58
    • 78

    Partly Sunny

    • 60
    • 81

    Partly Sunny

    • 63
    • 83

    Slight Chance Thunderstorms

    • 63
    • 83

    Slight Chance Thunderstorms

Today 7 Sep Grant

Mostly sunny. Near steady temperature in the mid 60s. Light Winds.

Tonight 7 Sep Grant

Partly cloudy. Lows in the mid 40s. Light Winds.

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  • Temperature Real-Time

Grant County Fairgrounds Temperature Statistics

September Temperature

Platteville Municipal Airport (16.8 miles)

  • Lowest 4 September, 2025

    42.3 °F

  • Average September

    60.2 °F

  • Highest 2 September, 2025

    76.1 °F

Climate (2020–Present)

Platteville Municipal Airport (16.8 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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