Wellesley Island Weather Forecast

    • 5
    • 16

    Mostly Cloudy

    • 1
    • 12

    Chance Snow Showers

    • -2
    • 13

    Chance Snow

    • 4
    • 14

    Chance Snow Showers

    • 15
    • 21

    Chance Snow Showers

    • 15
    • 27

    Chance Snow Showers

Today 19 Jan Jefferson

Cloudy, cold with Highs 15 to 20. North Winds 5 to 10 Mph, increasing to 10 to 15 Mph.

Tonight 19 Jan Jefferson

Cloudy. Lows Ranging from zero to 5 below on the tug hill to zero to 5 above across the lower Elevations. North Winds 10 to 15 Mph, Diminishing to 5 to 10 Mph.

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Wellesley Island Temperature Statistics

January Temperature

Watertown, Watertown International Airport (22.4 miles)

  • Lowest 6 January, 2025

    7.8 °F

  • Average January

    24.2 °F

  • Highest 1 January, 2025

    41.6 °F

Climate (2020–Present)

Watertown, Watertown International Airport (22.4 miles)

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  • Average Low 2020–2025

    39.1 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    57.6 °F
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