Williamstown Weather Forecast

    • 26
    • 47

    Rain Likely

    • 34
    • 42

    Mostly Cloudy

    • 29
    • 55

    Mostly Cloudy

    • 20
    • 41

    Mostly Cloudy

    • 25
    • 35

    Slight Chance Snow

    • 24
    • 37

    Chance Snow

Today 31 Jan Johnson

Widespread dense fog early this morning. A chance of rain with a slight chance of Thunderstorms late. Rain this Morning, then a slight chance of rain this afternoon. Highs in the mid 40s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 31 Jan Johnson

Mostly clear. Cooler with Lows in the mid 20s. Northeast Winds 5 to 10 Mph, becoming east after midnight.

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Williamstown Temperature Statistics

January Temperature

Iowa City Municipal Airport (10.6 miles)

  • Lowest 21 January, 2025

    -12.2 °F

  • Average January

    19.7 °F

  • Highest 17 January, 2025

    55.7 °F

Climate (2020–Present)

Iowa City Municipal Airport (10.6 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    62.2 °F
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