Williamstown Weather Forecast

    • 54
    • 74

    Mostly Cloudy

    • 56
    • 65

    Chance Rain Showers

    • 57
    • 71

    Mostly Cloudy

    • 61
    • 79

    Partly Sunny

    • 56
    • 78

    Chance Rain Showers

    • 47
    • 72

    Chance Rain Showers

Today 13 Oct Johnson

Mostly sunny. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 13 Oct Johnson

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 50s. Northeast Winds 5 to 10 Mph.

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Williamstown Temperature Statistics

October Temperature

Iowa City Municipal Airport (10.6 miles)

  • Lowest 8 October, 2025

    44.1 °F

  • Average October

    65.1 °F

  • Highest 3 October, 2025

    89.1 °F

Climate (2020–Present)

Iowa City Municipal Airport (10.6 miles)

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  • Average Low 2020–2025

    42.4 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    62.8 °F
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