Climate almanac
Washington
Pennsylvania, United States · 40.17°, -80.25°
What is the weather like in Washington in September?
In September, Washington is typically 78°F (25°C) during the day and 59°F (15°C) at night. The month brings about 4.3 in (108 mm) of precipitation in total.
- Average high78°F (25°C)
- Average low59°F (15°C)
- Precipitation4.3 in (108 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)