Jefferson County Fairgrounds Weather Forecast

    • 30
    • 48

    Becoming Sunny

    • 28
    • 48

    Slight Chance Rain Showers

    • 42
    • 54

    Partly Sunny

    • 42
    • 71

    Mostly Sunny

    • 48
    • 68

    Partly Sunny

    • 56
    • 76

    Chance Rain Showers

Today 18 Apr Jefferson

Much cooler. Mostly cloudy in the morning then becoming mostly sunny. Highs in the upper 40s. West Winds 15 to 20 Mph.

Tonight 18 Apr Jefferson

Partly cloudy in the evening then clearing. Lows around 30. West Winds 5 to 15 Mph.

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Jefferson County Fairgrounds Temperature Statistics

April Temperature

Watertown (11.8 miles)

  • Lowest 7 April, 2026

    19.6 °F

  • Average April

    44.9 °F

  • Highest 13 April, 2026

    73.2 °F

Climate (2021–Present)

Watertown (11.8 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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