Wellesley Island Weather Forecast

    • 35
    • 52

    Partly Sunny

    • 33
    • 51

    Slight Chance Rain Showers

    • 40
    • 52

    Chance Rain Showers

    • 48
    • 57

    Chance Rain Showers

    • 46
    • 60

    Rain Showers Likely

    • 41
    • 59

    Rain Showers Likely

Today 1 May Jefferson

Mostly sunny and cool with Highs in the lower 50s. Light Winds, becoming west around 10 Mph.

Tonight 1 May Jefferson

Partly cloudy with widespread frost developing. Lows in the lower 30s. Light Winds.

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Wellesley Island Temperature Statistics

May Temperature

Watertown, Watertown International Airport (22.4 miles)

  • Lowest

  • Average May

  • Highest

Climate (2021–Present)

Watertown, Watertown International Airport (22.4 miles)

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  • Average Low 2021–2026

    38.4 °F
  • Average 2021–2026

    48.3 °F
  • Average High 2021–2026

    57.5 °F
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