Williamstown Weather Forecast

    • 21
    • 33

    Chance Snow

    • -1
    • 24

    Snow

    • -3
    • 8

    Cold

    • 16
    • 21

    Partly Sunny

    • 28
    • 32

    Mostly Cloudy

    • 38
    • 43

    Chance Rain

Today 12 Dec Rush

Mostly cloudy. A chance of Flurries in the morning. Cold with Highs in the lower 30s. East Winds around 5 Mph, becoming northwest around 5 Mph in the afternoon.

Tonight 12 Dec Rush

Snow. Snow accumulation around an inch. Cold. Near steady temperature in the upper 20s. East Winds around 5 Mph. Chance of snow near 100 percent.

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Williamstown Temperature Statistics

December Temperature

Shelbyville Municipal Airport (19.9 miles)

  • Lowest 4 December, 2025

    7 °F

  • Average December

    26.5 °F

  • Highest 9 December, 2025

    42.1 °F

Climate (2020–Present)

Shelbyville Municipal Airport (19.9 miles)

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  • Average Low 2020–2025

    47.1 °F

  • Average 2020–2025

    56.9 °F

  • Average High 2020–2025

    66.9 °F
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