Waterloo Weather Forecast

    • 44
    • 76

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 60
    • 80

    Rain Showers Likely

    • 46
    • 73

    Rain Showers Likely

    • 43
    • 67

    Partly Sunny

    • 47
    • 66

    Chance Rain Showers

    • 45
    • 65

    Chance Rain Showers

Today 21 Apr Jefferson

Sunny. West Winds 5 to 10 Mph.

Tonight 21 Apr Jefferson

Mostly clear. Lows in the mid 40s. West Winds up to 5 Mph shifting to the northeast after midnight.

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Waterloo Temperature Statistics

April Temperature

Watertown (13 miles)

  • Lowest 7 April, 2026

    19.6 °F

  • Average April

    47.3 °F

  • Highest 17 April, 2026

    77 °F

Climate (2021–Present)

Watertown (13 miles)

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  • Average Low 2021–2026

    35.8 °F

  • Average 2021–2026

    45.6 °F

  • Average High 2021–2026

    54.7 °F
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