Boulogne-sur-Mer weather
Best months for weather: May–Sep. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Boulogne-sur-Mer, Hauts-de-France, France.
Best Time to Visit
Peak season May–SepOff season Nov–Feb
Boulogne-sur-Mer weather by month
When is the best time to visit Boulogne-sur-Mer?
Based on weather alone, the best time to visit Boulogne-sur-Mer is May–Sep, according to NASA's 2001–2025 climate averages. Nov–Feb tends to be the least pleasant. Average highs run from 6°C (43°F) in January to 21°C (70°F) in July.
What is the rainiest month in Boulogne-sur-Mer?
December is the wettest month, with about 92 mm (3.6 in) of rain on average. April is the driest, with about 44 mm (1.7 in).
What is the hottest month in Boulogne-sur-Mer?
July is the warmest, with average highs of 21°C (70°F) and lows of 13°C (55°F). January is the coolest, with highs of 6°C (43°F) and lows of 1°C (34°F).
Does Boulogne-sur-Mer have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is December at about 92 mm (3.6 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months