On Friday, 20 September, mostly partly cloudy weather, no precipitation are expected in Boulogne-sur-Mer. The lowest air temperature will be +14°C at 8 am, the highest temperature will be +20°C around 5 pm. The atmospheric pressure will be within 759-760 mm Hg. The relative humidity 70-88%. The wind will be mainly northeasterly 6 m/s with maximum gusts up to 9 m/s. Ultraviolet index 4, sun protection is required

On Saturday, 21 September, mostly partly cloudy, no precipitation are expected in Boulogne-sur-Mer. The lowest air temperature will be +14°C at 5 am, the highest temperature will be +21°C around 5 pm. The atmospheric pressure will be within 758-760 mm Hg. The relative humidity 65-89%. The wind will be mainly easterly 4 m/s with maximum gusts up to 8 m/s. Ultraviolet index 4, sun protection is required

On Sunday, 22 September, mostly cloudy weather, rain are expected in Boulogne-sur-Mer. The lowest air temperature will be +16°C at 8 am, the highest temperature will be +18°C around 2 pm. The atmospheric pressure will be within 755-758 mm Hg. The relative humidity 81-92%. The wind will be mainly southerly 3 m/s with maximum gusts up to 6 m/s. Ultraviolet index 3, sun protection is required

On Monday, 23 September, mostly partly cloudy, light rain are expected in Boulogne-sur-Mer. The lowest air temperature will be +15°C at 5 am, the highest temperature will be +17°C around 2 pm. The atmospheric pressure will be within 752-754 mm Hg. The relative humidity 84-94%. The wind will be mainly southwesterly 10 m/s with maximum gusts up to 15 m/s. Ultraviolet index 4, sun protection is required

On Tuesday, 24 September, mostly partly cloudy, light rain are expected in Boulogne-sur-Mer. The lowest air temperature will be +14°C at 8 am, the highest temperature will be +16°C around 2 pm. The atmospheric pressure will be within 751-754 mm Hg. The relative humidity 81-92%. The wind will be mainly southwesterly 5 m/s with maximum gusts up to 7 m/s. Ultraviolet index 4, sun protection is required

On Wednesday, 25 September, mostly partly cloudy, no precipitation are expected in Boulogne-sur-Mer. The lowest air temperature will be +12°C at 11 pm, the highest temperature will be +15°C around 2 pm. The atmospheric pressure will be within 754-759 mm Hg. The relative humidity 68-92%. The wind will be mainly northeasterly 3 m/s with maximum gusts up to 5 m/s. Ultraviolet index 4, sun protection is required

On Thursday, 26 September, mostly cloudy weather, rain are expected in Boulogne-sur-Mer. The lowest air temperature will be +10°C at 8 am, the highest temperature will be +15°C around 5 pm. The atmospheric pressure will be within 754-758 mm Hg. The relative humidity 65-80%. The wind will be mainly southerly 6 m/s with maximum gusts up to 7 m/s. Ultraviolet index 4, sun protection is required

On Friday, 27 September, mostly partly cloudy, rain are expected in Boulogne-sur-Mer. The lowest air temperature will be +11°C at 5 am, the highest temperature will be +14°C around 2 pm. The atmospheric pressure will be within 749-752 mm Hg. The relative humidity 73-89%. The wind will be mainly southwesterly 10 m/s with maximum gusts up to 15 m/s. Ultraviolet index 3, sun protection is required

On Saturday, 28 September, mostly partly cloudy, no precipitation are expected in Boulogne-sur-Mer. The lowest air temperature will be +11°C at 8 am, the highest temperature will be +13°C around 2 pm. The atmospheric pressure will be within 753-756 mm Hg. The relative humidity 61-83%. The wind will be mainly southwesterly 4 m/s with maximum gusts up to 7 m/s. Ultraviolet index 4, sun protection is required