Climate almanac
Mount Dennis
Ontario, Canada · 43.69°, -79.49°
What is the weather like in Mount Dennis in September?
In September, Mount Dennis is typically 72°F (22°C) during the day and 56°F (13°C) at night. The month brings about 2.0 in (52 mm) of precipitation in total.
- Average high72°F (22°C)
- Average low56°F (13°C)
- Precipitation2.0 in (52 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)