Climate almanac
Great Falls
Virginia, United States · 39.00°, -77.29°
What is the weather like in Great Falls in September?
In September, Great Falls is typically 80°F (27°C) during the day and 63°F (17°C) at night. The month brings about 4.3 in (109 mm) of precipitation in total.
- Average high80°F (27°C)
- Average low63°F (17°C)
- Precipitation4.3 in (109 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)