Waterloo Weather Forecast

    • 60
    • 82

    Mostly Sunny

    • 62
    • 83

    Rain Showers Likely

    • 57
    • 76

    Chance Rain Showers

    • 57
    • 80

    Mostly Sunny

    • 61
    • 82

    Partly Sunny

    • 65
    • 83

    Slight Chance Thunderstorms

    • 65
    • 84

    Chance Thunderstorms

Today 3 Aug Jefferson

Sunny. Near steady temperature in the upper 70s. South Winds up to 5 Mph.

Tonight 3 Aug Jefferson

Mostly clear. Lows around 60. South Winds up to 5 Mph.

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Waterloo Temperature Statistics

August Temperature

Watertown (13 miles)

  • Lowest 1 August, 2026

    61.3 °F

  • Average August

    65.7 °F

  • Highest 1 August, 2026

    73.9 °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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