Taking the local weather in Flancourt-Crescy-en-Roumois into account can help you maximise your time at the pool during your trip. The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are January and February, with an average of 5°C. Average annual precipitation for Flancourt-Crescy-en-Roumois is 828 mm.