Weather is probably a major factor when you plan your trip to Pont-Saint-Martin, 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 19°C, while the coldest months are January and February, with an average of 3°C. The rainiest months in Pont-Saint-Martin are November, May, October and April, with each month seeing an average of 194 mm of rainfall.