Mertensia Park Weather Forecast

    • 52
    • 67

    Rain Showers Likely

    • 46
    • 65

    Rain Showers

    • 43
    • 60

    Mostly Cloudy

    • 43
    • 62

    Mostly Cloudy

    • 44
    • 63

    Chance Rain Showers

    • 45
    • 63

    Slight Chance Rain Showers

Today 19 Sep Ontario

Mostly sunny this Morning, then becoming mostly cloudy. Highs Ranging from the lower 60s on the Hilltops to the upper 60s across the lower Elevations. Light east Winds.

Tonight 19 Sep Ontario

Mostly cloudy. Showers likely overnight. Lows in the mid 50s. Light Winds, becoming south 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mertensia Park Temperature Statistics

September Temperature

Rochester, Greater Rochester International Airport (18.6 miles)

  • Lowest 15 September, 2026

    47.6 °F

  • Average September

    68.3 °F

  • Highest 2 September, 2026

    85.6 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (18.6 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.5 °F
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