Climate almanac
Boulogne-sur-Mer
Hauts-de-France, France · 50.72°, 1.61°
What is the weather like in Boulogne-sur-Mer in September?
In September, Boulogne-sur-Mer is typically 66°F (19°C) during the day and 57°F (14°C) at night. The month brings about 3.6 in (93 mm) of precipitation in total.
- Average high66°F (19°C)
- Average low57°F (14°C)
- Precipitation3.6 in (93 mm)
- Clear or mostly clear days6
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)