Jefferson County Fairgrounds Weather Forecast

    • 61
    • 80

    Slight Chance Rain Showers

    • 60
    • 78

    Chance Thunderstorms

    • 53
    • 78

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 56
    • 76

    Partly Sunny

    • 62
    • 80

    Chance Rain Showers

    • 60
    • 81

    Slight Chance Thunderstorms

Today 20 Aug Jefferson

Partly sunny. South Winds up to 5 Mph.

Tonight 20 Aug Jefferson

Partly cloudy until early morning then becoming mostly cloudy. Lows in the lower 60s. South Winds up to 5 Mph.

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Jefferson County Fairgrounds Temperature Statistics

August Temperature

Watertown (11.8 miles)

  • Lowest 3 August, 2026

    52.9 °F

  • Average August

    71.2 °F

  • Highest 7 August, 2026

    83.8 °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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