Waterloo Weather Forecast

    • 61
    • 85

    Mostly Sunny

    • 61
    • 85

    Partly Sunny

    • 59
    • 79

    Slight Chance Rain Showers

    • 61
    • 78

    Chance Rain Showers

    • 61
    • 81

    Chance Thunderstorms

    • 59
    • 81

    Chance Rain Showers

    • 55
    • 77

    Slight Chance Thunderstorms

Today 17 Sep Jefferson

Sunny. Southeast Winds up to 5 Mph.

Tonight 17 Sep Jefferson

Partly cloudy. Lows in the lower 60s. Southeast Winds up to 5 Mph.

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Waterloo Temperature Statistics

September Temperature

Watertown (13 miles)

  • Lowest

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  • Average September

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Climate (2020–Present)

Watertown (13 miles)

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  • Average Low 2020–2025

    35.7 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    54.5 °F
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