Watertown Weather Forecast

    • 65
    • 74

    Rain Showers

    • 51
    • 73

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

    • 65
    • 77

    Chance Rain Showers

    • 58
    • 76

    Chance Rain Showers

    • 56
    • 71

    Chance Rain Showers

Today 9 Sep Jefferson

A chance of Showers late this morning. Showers early this Afternoon, then Showers with a chance of Thunderstorms late. Highs Ranging from the upper 60s on the tug hill to the mid 70s across the lower Elevations. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph. Chance of rain near 100 percent.

Tonight 9 Sep Jefferson

Mostly cloudy. Showers with a chance of Thunderstorms in the Evening, then a chance of Showers overnight. Breezy, warm and muggy with Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph in the Evening, becoming west. Chance of rain 90 percent.

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Watertown Temperature Statistics

September Temperature

Watertown, Watertown International Airport (5.6 miles)

  • Lowest 6 September, 2026

    50 °F

  • Average September

    68 °F

  • Highest 2 September, 2026

    83.6 °F

Climate (2021–2026)

Watertown, Watertown International Airport (5.6 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    48.2 °F

  • Average High 2021–2026

    57.6 °F
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