Waterloo Weather Forecast

    • 35
    • 40

    Decreasing Clouds

    • 35
    • 48

    Rain

    • 30
    • 41

    Rain/Snow Likely

    • 18
    • 35

    Snow Likely

    • 17
    • 27

    Partly Sunny

    • 26
    • 35

    Mostly Cloudy

Today 7 Jan Jefferson

Cloudy until late afternoon then becoming partly sunny. Areas of freezing fog in the morning. Areas of fog until late afternoon. Highs in the lower 40s. Southwest Winds 5 to 10 Mph.

Tonight 7 Jan Jefferson

Partly cloudy. Lows in the mid 30s. South Winds 5 to 10 Mph.

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Waterloo Temperature Statistics

January Temperature

Watertown (13 miles)

  • Lowest 4 January, 2026

    4.5 °F

  • Average January

    19 °F

  • Highest 5 January, 2026

    36.1 °F

Climate (2021–Present)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.6 °F

  • Average 2021–2026

    45.4 °F

  • Average High 2021–2026

    54.5 °F
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