Williamstown Weather Forecast

    • 69
    • 87

    Chance Thunderstorms

    • 61
    • 87

    Chance Rain Showers

    • 56
    • 73

    Chance Rain Showers

    • 57
    • 72

    Chance Rain Showers

Today 19 Sep Rush

Partly cloudy through early Afternoon, then clearing. Highs in the mid 70s.

Tonight 19 Sep Rush

Partly cloudy late this Afternoon, then becoming mostly cloudy. A chance of Showers and Thunderstorms late this Afternoon, then a slight chance of Showers and Thunderstorms through the late overnight. Humid with Lows in the upper 60s. South Winds around 5 Mph. Chance of rain 50 percent.

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Williamstown Temperature Statistics

September Temperature

Shelbyville Municipal Airport (19.9 miles)

  • Lowest 14 September, 2026

    53.7 °F

  • Average September

    77.6 °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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