Climate almanac
Cornelius
Oregon, United States · 45.52°, -123.06°
What is the weather like in Cornelius in September?
In September, Cornelius is typically 77°F (25°C) during the day and 54°F (12°C) at night. The month brings about 2.0 in (51 mm) of precipitation in total.
- Average high77°F (25°C)
- Average low54°F (12°C)
- Precipitation2.0 in (51 mm)
- Clear or mostly clear days13
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)