Williamstown Weather Forecast

    • 24
    • 32

    Mostly Cloudy

    • 17
    • 39

    Mostly Sunny

    • 0
    • 32

    Mostly Cloudy

    • -4
    • 6

    Cold

    • 0
    • 10

    Slight Chance Snow

    • 4
    • 20

    Mostly Sunny

Today 20 Jan Lewis

Mostly sunny. Not as cool with Highs in the mid 30s. South Winds 5 to 10 Mph.

Tonight 20 Jan Lewis

Mostly cloudy and not as cool. Near steady temperature around 30. South Winds 10 to 15 Mph, becoming southwest after midnight.

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Williamstown Temperature Statistics

January Temperature

Keokuk Municipal Airport (24.2 miles)

  • Lowest 18 January, 2026

    6.8 °F

  • Average January

    32.5 °F

  • Highest 7 January, 2026

    62.6 °F

Climate (2021–Present)

Keokuk Municipal Airport (24.2 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    62.7 °F
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