Climate almanac
Derby
Connecticut, United States · 41.32°, -73.09°
What is the weather like in Derby in September?
In September, Derby is typically 73°F (23°C) during the day and 64°F (18°C) at night. The month brings about 4.6 in (117 mm) of precipitation in total.
- Average high73°F (23°C)
- Average low64°F (18°C)
- Precipitation4.6 in (117 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)