Williamstown Weather Forecast

    • 46
    • 72

    Becoming Sunny

    • 48
    • 75

    Sunny

    • 55
    • 80

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

    • 58
    • 85

    Mostly Sunny

    • 57
    • 85

    Mostly Sunny

Today 7 Sep Grant

Mostly sunny. Highs in the lower 70s. Southwest Winds around 5 Mph, becoming northwest around 5 Mph this afternoon.

Tonight 7 Sep Grant

Clear. Lows in the mid 40s. North Winds around 5 Mph.

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Williamstown Temperature Statistics

September Temperature

Cincinnati/Northern Kentucky International Airport (28.6 miles)

  • Lowest 4 September, 2025

    54 °F

  • Average September

    68.9 °F

  • Highest 2 September, 2025

    84 °F

Climate (2020–Present)

Cincinnati/Northern Kentucky International Airport (28.6 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    56.4 °F

  • Average High 2020–2025

    65.7 °F
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