Climate almanac
Washington
New Jersey, United States · 40.76°, -74.98°
What is the weather like in Washington in September?
In September, Washington is typically 77°F (25°C) during the day and 59°F (15°C) at night. The month brings about 4.0 in (101 mm) of precipitation in total.
- Average high77°F (25°C)
- Average low59°F (15°C)
- Precipitation4.0 in (101 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)