Waterloo Weather Forecast

    • 65
    • 89

    Rain Showers

    • 59
    • 84

    Mostly Sunny

    • 62
    • 86

    Mostly Sunny

    • 66
    • 88

    Chance Thunderstorms

    • 64
    • 83

    Chance Thunderstorms

    • 62
    • 81

    Slight Chance Thunderstorms

    • 59
    • 84

    Mostly Sunny

Today 27 Jul Jefferson

Numerous Showers and scattered Thunderstorms. Some Thunderstorms may be severe with damaging Winds and large hail. Heat index Readings 97 to 102. West Winds 10 to 15 Mph. Chance of precipitation 70 percent.

Tonight 27 Jul Jefferson

Cooler. Partly cloudy. Lows in the mid 60s. North Winds 5 to 15 Mph.

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Waterloo Temperature Statistics

July Temperature

Watertown (13 miles)

  • Lowest 23 July, 2026

    47.8 °F

  • Average July

    74.3 °F

  • Highest 14 July, 2026

    95.4 °F

Climate (2021–2026)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    44.9 °F

  • Average High 2021–2026

    53.9 °F
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