Waterloo Weather Forecast

    • 0
    • 7

    Cold

    • 10
    • 24

    Mostly Cloudy

    • 25
    • 36

    Mostly Cloudy

    • 28
    • 37

    Rain Likely

    • 5
    • 39

    Slight Chance Rain/Snow

    • 17
    • 27

    Slight Chance Rain/Snow

Today 14 Dec Jefferson

Bitterly cold. Sunny. Highs around 7. Northwest Winds 5 to 10 Mph. Lowest wind chill Readings 18 below to 28 below zero in the morning.

Tonight 14 Dec Jefferson

Partly cloudy through around midnight then becoming mostly cloudy. Lows near zero. Southwest Winds 5 to 15 Mph. Gusts up to 30 Mph after midnight.

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Waterloo Temperature Statistics

December Temperature

Watertown (13 miles)

  • Lowest 7 December, 2025

    -2.7 °F

  • Average December

    18.5 °F

  • Highest 10 December, 2025

    33.8 °F

Climate (2020–Present)

Watertown (13 miles)

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  • Average Low 2020–2025

    35.7 °F

  • Average 2020–2025

    45.5 °F

  • Average High 2020–2025

    54.5 °F
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