Climate almanac
Yorktown
Pennsylvania, United States · 39.97°, -75.15°
What is the weather like in Yorktown in September?
In September, Yorktown is typically 79°F (26°C) during the day and 63°F (17°C) at night. The month brings about 3.8 in (96 mm) of precipitation in total.
- Average high79°F (26°C)
- Average low63°F (17°C)
- Precipitation3.8 in (96 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)