Mertensia Park Weather Forecast

    • 53
    • 78

    Mostly Sunny

    • 55
    • 80

    Increasing Clouds

    • 55
    • 79

    Partly Sunny

    • 58
    • 82

    Mostly Sunny

    • 45
    • 70

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 59
    • 80

    Chance Rain Showers

Today 15 Sep Ontario

Sunny. Highs Ranging from the lower 70s on the Hilltops to the upper 70s across the lower Elevations. Light northeast Winds.

Tonight 15 Sep Ontario

Mainly clear with some patchy fog developing late. Lows in the mid 50s. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mertensia Park Temperature Statistics

September Temperature

Rochester, Greater Rochester International Airport (18.6 miles)

  • Lowest 8 September, 2025

    43 °F

  • Average September

    61.8 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Rochester, Greater Rochester International Airport (18.6 miles)

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

  • Average Low 2020–2025

    42.6 °F

  • Average 2020–2025

    51 °F

  • Average High 2020–2025

    59.6 °F
Get WillyWeather+ to remove ads