Weather will likely play an important role when you plan your trip to Divonne-les-Bains, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and January, with an average of 0°C. The rainiest months in Divonne-les-Bains are December, May, June and August, with each month seeing an average of 217 mm of rainfall.