Round Island Weather Forecast

    • 19
    • 34

    Decreasing Clouds

    • 23
    • 34

    Partly Sunny

    • 32
    • 41

    Rain Showers Likely

    • 22
    • 48

    Rain/Snow Likely

    • 15
    • 30

    Partly Sunny

    • 22
    • 33

    Partly Sunny

Today 23 Mar Jefferson

Mostly cloudy. A chance of. Cold with Highs Ranging from the upper 20s on the tug hill to the lower 30s across the lower Elevations. North Winds 5 to 10 Mph.

Tonight 23 Mar Jefferson

Mostly cloudy with a chance of snow Showers in the Evening, then partly cloudy overnight. Lows 15 to 20. Northwest Winds 5 to 10 Mph, becoming light. Chance of snow 30 percent.

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Round Island Temperature Statistics

March Temperature

Watertown, Watertown International Airport (18 miles)

  • Lowest 2 March, 2026

    -2.3 °F

  • Average March

    33.7 °F

  • Highest 9 March, 2026

    67.6 °F

Climate (2021–Present)

Watertown, Watertown International Airport (18 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    57.6 °F
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