Waterloo Weather Forecast

    • 51
    • 71

    Gradual Clearing

    • 38
    • 78

    Thunderstorms

    • 30
    • 48

    Chance Rain Showers

    • 27
    • 48

    Mostly Sunny

    • 45
    • 58

    Partly Sunny

    • 44
    • 72

    Mostly Sunny

    • 46
    • 69

    Mostly Sunny

Today 16 Apr Jefferson

Partly sunny. Near steady temperature in the upper 60s. Northwest Winds up to 5 Mph.

Tonight 16 Apr Jefferson

Partly cloudy. Areas of fog in the late evening and overnight. Lows around 50. Southeast Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Waterloo Temperature Statistics

April Temperature

Watertown (13 miles)

  • Lowest 7 April, 2026

    19.6 °F

  • Average April

    44.9 °F

  • Highest 13 April, 2026

    73.2 °F

Climate (2021–Present)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    54.7 °F
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