Waterloo Weather Forecast

    • 22
    • 23

    Wintry Mix Likely

    • 12
    • 34

    Snow Likely

    • 3
    • 19

    Snow Likely

    • 2
    • 15

    Slight Chance Snow

    • -3
    • 8

    Cold

    • 4
    • 14

    Mostly Cloudy

Today 15 Jan Jefferson

Sunny until late Afternoon, then mostly cloudy with a 20 percent chance of light snow late in the afternoon. Highs in the mid 20s. Northwest Winds 5 to 10 Mph shifting to the southwest in the afternoon.

Tonight 15 Jan Jefferson

Colder. Partly cloudy. Near steady temperature around 14. North Winds 10 to 15 Mph.

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Waterloo Temperature Statistics

January Temperature

Watertown (13 miles)

  • Lowest 4 January, 2026

    4.5 °F

  • Average January

    27.7 °F

  • Highest 9 January, 2026

    55.2 °F

Climate (2021–Present)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    54.5 °F
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