Williamstown Weather Forecast

    • 55
    • 76

    Partly Sunny

    • 59
    • 78

    Mostly Cloudy

    • 61
    • 78

    Rain Showers Likely

    • 62
    • 81

    Chance Thunderstorms

    • 62
    • 85

    Slight Chance Rain Showers

    • 65
    • 85

    Chance Thunderstorms

Today 23 Sep Jefferson

Mostly sunny. Highs in the mid 70s. East Winds around 5 Mph.

Tonight 23 Sep Jefferson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 50s. East Winds around 5 Mph.

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Williamstown Temperature Statistics

September Temperature

Lawrence, Lawrence Municipal Airport (7.5 miles)

  • Lowest 11 September, 2026

    61.6 °F

  • Average September

    80.9 °F

  • Highest 8 September, 2026

    103.6 °F

Climate (2021–2026)

Lawrence, Lawrence Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    57.2 °F

  • Average High 2021–2026

    69.8 °F
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