Waterloo Weather Forecast

    • 65
    • 84

    Mostly Cloudy

    • 65
    • 81

    Rain Showers Likely

    • 64
    • 82

    Slight Chance Thunderstorms

    • 59
    • 80

    Chance Rain Showers

    • 59
    • 77

    Rain Showers Likely

    • 63
    • 77

    Rain Showers Likely

    • 59
    • 78

    Slight Chance Rain Showers

Today 10 Aug Jefferson

Partly sunny. Highs in the lower 80s. East Winds up to 5 Mph.

Tonight 10 Aug Jefferson

Partly cloudy through around midnight then becoming mostly cloudy. Chance of light Showers and slight chance of Thunderstorms. Patchy fog early in the morning. Lows in the mid 60s. East Winds up to 5 Mph. Chance of precipitation 50 percent.

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Waterloo Temperature Statistics

August Temperature

Watertown (13 miles)

  • Lowest 3 August, 2026

    52.9 °F

  • Average August

    70.3 °F

  • Highest 7 August, 2026

    83.8 °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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