Waterloo Weather Forecast

    • 55
    • 73

    Slight Chance Thunderstorms

    • 48
    • 65

    Mostly Cloudy

    • 43
    • 61

    Rain Showers Likely

    • 31
    • 56

    Mostly Sunny

    • 37
    • 58

    Sunny

    • 44
    • 64

    Partly Sunny

Today 13 Oct Jefferson

Cooler, sunny. Highs in the mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 13 Oct Jefferson

Partly cloudy with chance of light rain Showers and slight chance of Thunderstorms through around Midnight, then mostly cloudy after midnight. Lows in the mid 50s. North Winds up to 5 Mph. Chance of precipitation 40 percent.

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Waterloo Temperature Statistics

October Temperature

Watertown (13 miles)

  • Lowest 5 October, 2026

    37.4 °F

  • Average October

    58.6 °F

  • Highest 10 October, 2026

    84.4 °F

Climate (2021–2026)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.1 °F

  • Average 2021–2026

    44.8 °F

  • Average High 2021–2026

    53.8 °F
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