Grant County Fairgrounds Weather Forecast

    • 6
    • 35

    Chance Snow

    • 9
    • 18

    Slight Chance Snow

    • 12
    • 22

    Partly Sunny

    • 9
    • 25

    Partly Sunny

    • 23
    • 27

    Mostly Cloudy

    • 26
    • 37

    Mostly Cloudy

    • 21
    • 37

    Mostly Cloudy

Today 31 Dec Grant

Snow with a slight chance of drizzle. Snow accumulation little or no. Highs in the mid 30s. Temperature falling to around 30 late. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of snow 100 percent.

Tonight 31 Dec Grant

Mostly cloudy with scattered Flurries this Evening, then partly cloudy after midnight. Much Colder with Lows around 6 above. Northwest Winds 10 to 15 Mph.

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Grant County Fairgrounds Temperature Statistics

December Temperature

Platteville Municipal Airport (16.8 miles)

  • Lowest 14 December, 2025

    -7.8 °F

  • Average December

    21.9 °F

  • Highest 23 December, 2025

    43.7 °F

Climate (2021–Present)

Platteville Municipal Airport (16.8 miles)

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  • Average Low 2021–2025

    40.7 °F

  • Average 2021–2025

    49.9 °F

  • Average High 2021–2025

    58.7 °F
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