Lake Ontario Weather Forecast

    • 52
    • 58

    Rain Showers

    • 53
    • 61

    Rain Showers Likely

    • 51
    • 67

    Mostly Cloudy

    • 55
    • 75

    Partly Sunny

    • 50
    • 70

    Mostly Sunny

    • 50
    • 71

    Mostly Sunny

Today 18 Sep Wells

A chance of Showers Late, then Showers likely. Highs in the upper 50s. Northeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 18 Sep Wells

Showers likely and a slight chance of Thunderstorms in the Evening, then Showers likely after midnight. Lows in the lower 50s. North Winds around 10 Mph. Chance of rain 60 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Ontario Temperature Statistics

September Temperature

Harvey Municipal Airport (21.1 miles)

  • Lowest 7 September, 2025

    33.8 °F

  • Average September

    59.6 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Harvey Municipal Airport (21.1 miles)

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

  • Average Low 2020–2025

    30.1 °F

  • Average 2020–2025

    41.2 °F

  • Average High 2020–2025

    51.9 °F
Get WillyWeather+ to remove ads