Wellesley Island State Park Weather Forecast

    • 16
    • 23

    Chance Snow Showers

    • 21
    • 34

    Snow Showers Likely

    • 16
    • 25

    Chance Snow Showers

    • 1
    • 23

    Snow Showers Likely

    • -1
    • 10

    Chance Snow Showers

    • 8
    • 20

    Chance Snow Showers

Today 16 Jan Jefferson

Mostly sunny in the Morning, then partly sunny with a chance of snow Showers in the afternoon. Highs Ranging from the mid 20s inland to the upper 20s along the lake Ontario shore. West Winds 5 to 10 Mph, becoming light. Chance of snow 30 percent.

Tonight 16 Jan Jefferson

Mostly cloudy with a 50 percent chance of snow Showers. Lows zero to 5 below. West Winds 10 to 15 Mph.

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Wellesley Island State Park Temperature Statistics

January Temperature

Watertown, Watertown International Airport (21.1 miles)

  • Lowest 4 January, 2026

    0 °F

  • Average January

    26.9 °F

  • Highest 9 January, 2026

    51.1 °F

Climate (2021–Present)

Watertown, Watertown International Airport (21.1 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    57.6 °F
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