Waterloo Weather Forecast

    • 60
    • 76

    Rain Showers Likely

    • 54
    • 67

    Rain Showers Likely

    • 49
    • 61

    Rain Showers Likely

    • 46
    • 61

    Partly Sunny

    • 51
    • 66

    Partly Sunny

    • 53
    • 67

    Partly Sunny

Today 19 Sep Black Hawk

Showers likely with a chance of Thunderstorms. Near steady temperature in the mid 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.

Tonight 19 Sep Black Hawk

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Humid with Lows around 60. North Winds 10 to 15 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Waterloo Temperature Statistics

September Temperature

Waterloo, Waterloo Municipal Airport (5 miles)

  • Lowest 13 September, 2026

    49.6 °F

  • Average September

    71.3 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

Waterloo, Waterloo Municipal Airport (5 miles)

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  • Average Low 2021–2026

    40.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    61.9 °F
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