Mertensia Park Weather Forecast
- 65
- 81
Slight Chance Rain Showers
- 52
- 79
Chance Rain Showers
- 49
- 66
Partly Sunny
- 62
- 75
Rain Showers Likely
- 61
- 79
Chance Rain Showers
- 56
- 75
Rain Showers Likely
Today 12 Sep Ontario
Mostly sunny through early Afternoon, then mostly cloudy with a chance of Showers late. Highs Ranging from the mid 70s on the Hilltops to around 80 across the lower Elevations. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph. Chance of rain 40 percent.
Tonight 12 Sep Ontario
Showers with a chance of Thunderstorms in the Evening, then a chance of Showers overnight. Warmer and muggy with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 80 percent.
Mertensia Park Temperature Statistics
September Temperature
Rochester, Greater Rochester International Airport (18.6 miles)
Lowest 7 September, 2026
50.6 °FAverage September
69.7 °FHighest 2 September, 2026
85.6 °F
Climate (2021–2026)
Rochester, Greater Rochester International Airport (18.6 miles)
Average Low 2021–2026
42.3 °FAverage 2021–2026
50.8 °FAverage High 2021–2026
59.5 °F