Waterloo Weather Forecast

    • 34
    • 57

    Chance Rain

    • 41
    • 47

    Mostly Cloudy

    • 39
    • 64

    Mostly Cloudy

    • 34
    • 57

    Mostly Cloudy

    • 42
    • 51

    Mostly Cloudy

    • 40
    • 58

    Rain Likely

Today 31 Jan Monroe

Mostly cloudy. Patchy dense fog in the morning. A slight chance of rain in the afternoon. Highs in the mid 50s. Temperature falling to around 50 in the afternoon. West Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 31 Jan Monroe

Cloudy with a 40 percent chance of rain. Widespread dense fog. Not as cool. Near steady temperature in the mid 40s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Waterloo Temperature Statistics

January Temperature

St. Louis Downtown Airport (15.5 miles)

  • Lowest 21 January, 2025

    2.8 °F

  • Average January

    27.3 °F

  • Highest 28 January, 2025

    55 °F

Climate (2020–Present)

St. Louis Downtown Airport (15.5 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.1 °F
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