Wellesley Island Weather Forecast

    • -14
    • 12

    Decreasing Clouds

    • -5
    • 5

    Cold

    • -7
    • 10

    Cold

    • -1
    • 13

    Partly Sunny

    • 8
    • 23

    Mostly Cloudy

    • 2
    • 24

    Mostly Cloudy

Today 29 Jan Jefferson

Mostly cloudy. A chance of snow Showers through early afternoon. Cold with Highs 10 to 15. Light Winds, becoming northwest 5 to 10 Mph. Chance of snow 40 percent.

Tonight 29 Jan Jefferson

Partly to mostly cloudy. Cold with Lows 15 below to 20 below zero. Northwest Winds 5 to 10 Mph, becoming light. Wind chill Values as low as 30 below.

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  • Temperature Real-Time

Wellesley Island Temperature Statistics

January Temperature

Watertown, Watertown International Airport (22.4 miles)

  • Lowest 24 January, 2026

    -33.4 °F

  • Average January

    19.8 °F

  • Highest 9 January, 2026

    51.7 °F

Climate (2021–Present)

Watertown, Watertown International Airport (22.4 miles)

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  • Average Low 2021–2026

    38.6 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    57.6 °F
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