Waterloo Weather Forecast

    • 5
    • 39

    Rain Likely

    • 21
    • 29

    Partly Sunny

    • 10
    • 36

    Partly Sunny

    • 19
    • 27

    Mostly Cloudy

    • 30
    • 38

    Mostly Cloudy

    • 26
    • 40

    Mostly Cloudy

Today 18 Dec Black Hawk

Rain this Morning, then partly sunny with scattered snow Showers this afternoon. Little or no snow accumulation. Windy with Highs in the upper 30s. Temperature falling into the lower 20s this afternoon. West Winds 15 to 25 Mph, increasing to 25 to 30 Mph this afternoon. Gusts up to 45 Mph. Chance of precipitation near 100 percent.

Tonight 18 Dec Black Hawk

Mostly cloudy with isolated snow Showers in the Evening, then partly cloudy after midnight. Windy and much cooler with Lows around 4 above. Northwest Winds 25 to 30 Mph, Diminishing to 15 to 25 Mph after midnight. Gusts up to 45 Mph. Chance of snow 20 percent.

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Waterloo Temperature Statistics

December Temperature

Waterloo, Waterloo Municipal Airport (5 miles)

  • Lowest 4 December, 2025

    -13 °F

  • Average December

    16.5 °F

  • Highest 9 December, 2025

    44.1 °F

Climate (2020–Present)

Waterloo, Waterloo Municipal Airport (5 miles)

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  • Average Low 2020–2025

    40.1 °F

  • Average 2020–2025

    51 °F

  • Average High 2020–2025

    61.6 °F
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