Williamstown Weather Forecast

    • 48
    • 71

    Mostly Sunny

    • 46
    • 69

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 50
    • 71

    Partly Sunny

    • 58
    • 73

    Partly Sunny

Today 25 Sep Rush

Mostly cloudy with a 50 percent chance of Showers. Highs in the mid 70s.

Tonight 25 Sep Rush

Partly cloudy through the late Overnight, then clearing. Patchy fog toward daybreak. Lows in the upper 40s. Northeast Winds around 5 Mph.

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Williamstown Temperature Statistics

September Temperature

Shelbyville Municipal Airport (19.9 miles)

  • Lowest 14 September, 2026

    53.7 °F

  • Average September

    75.3 °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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