Wellesley Island Weather Forecast

    • 50
    • 67

    Decreasing Clouds

    • 55
    • 73

    Mostly Sunny

    • 57
    • 75

    Rain Showers

    • 55
    • 77

    Chance Rain Showers

    • 53
    • 72

    Chance Rain Showers

    • 52
    • 71

    Rain Showers Likely

    • 53
    • 72

    Chance Rain Showers

Today 15 Jun Jefferson

Partly sunny and cool with Highs Ranging from the upper 50s on the tug hill to the mid 60s across the lower Elevations. Southwest Winds 5 to 10 Mph, increasing to 10 to 15 Mph.

Tonight 15 Jun Jefferson

Partly cloudy. Lows Ranging from the upper 40s across the tug hill to the lower 50s along the lake Ontario shore. Southwest Winds 5 to 10 Mph, becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Wellesley Island Temperature Statistics

June Temperature

Watertown, Watertown International Airport (22.4 miles)

  • Lowest 2 June, 2026

    36.6 °F

  • Average June

    65.4 °F

  • Highest 9 June, 2026

    83.6 °F

Climate (2021–Present)

Watertown, Watertown International Airport (22.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.5 °F
Get WillyWeather+ to remove ads