Jefferson County Fairgrounds Weather Forecast

    • 60
    • 81

    Mostly Sunny

    • 53
    • 82

    Partly Sunny

    • 53
    • 74

    Chance Rain Showers

    • 61
    • 75

    Rain Showers Likely

    • 53
    • 74

    Chance Rain Showers

    • 55
    • 69

    Chance Rain Showers

Today 11 Sep Jefferson

Sunny. Highs around 80. South Winds 5 to 10 Mph.

Tonight 11 Sep Jefferson

Partly cloudy. Lows in the lower 60s. South Winds 5 to 10 Mph.

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Jefferson County Fairgrounds Temperature Statistics

September Temperature

Watertown (11.8 miles)

  • Lowest 7 September, 2026

    54.9 °F

  • Average September

    72 °F

  • Highest 1 September, 2026

    87.3 °F

Climate (2021–2026)

Watertown (11.8 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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