Williamstown Weather Forecast

    • 72
    • 92

    Slight Chance Thunderstorms

    • 69
    • 87

    Chance Rain Showers

    • 64
    • 83

    Partly Sunny

    • 70
    • 89

    Chance Thunderstorms

    • 64
    • 86

    Chance Rain Showers

    • 62
    • 84

    Chance Rain Showers

    • 62
    • 80

    Chance Rain Showers

Today 16 Sep Rush

Partly cloudy with a 20 percent chance of Showers. Lows in the lower 60s. Highs in the upper 70s.

Tonight 16 Sep Rush

Partly cloudy. Scattered Showers and Thunderstorms late this Afternoon, then a slight chance of Showers and Thunderstorms toward daybreak. Humid with Lows in the lower 70s. West Winds around 5 Mph late this Afternoon, becoming light and Variable, then becoming southwest around 5 Mph toward daybreak. Chance of rain 40 percent.

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Williamstown Temperature Statistics

September Temperature

Shelbyville Municipal Airport (19.9 miles)

  • Lowest 14 September, 2026

    54 °F

  • Average September

    77.1 °F

  • Highest 4 September, 2026

    96.7 °F

Climate (2021–2026)

Shelbyville Municipal Airport (19.9 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    56.9 °F

  • Average High 2021–2026

    67 °F
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