Climate almanac
Hermiston
Oregon, United States · 45.84°, -119.29°
What is the weather like in Hermiston in September?
In September, Hermiston is typically 83°F (28°C) during the day and 56°F (14°C) at night. The month brings about 0.4 in (10 mm) of precipitation in total.
- Average high83°F (28°C)
- Average low56°F (14°C)
- Precipitation0.4 in (10 mm)
- Clear or mostly clear days17
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)