Waterloo Weather Forecast

    • 51
    • 74

    Increasing Clouds

    • 53
    • 77

    Mostly Sunny

    • 45
    • 73

    Sunny

    • 48
    • 74

    Mostly Sunny

    • 54
    • 80

    Sunny

    • 56
    • 82

    Sunny

Today 3 Oct Monroe

Sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 3 Oct Monroe

Mostly cloudy in the Evening, then becoming partly cloudy. Lows around 50. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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Waterloo Temperature Statistics

October Temperature

St. Louis Downtown Airport (15.5 miles)

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Climate (2021–2026)

St. Louis Downtown Airport (15.5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.5 °F
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