Weather is probably a major factor when you plan your trip to Petite-Riviere-Saint-Francois, 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 15°C, while the coldest months are January and February, with an average of -9°C. The snowiest months in Petite-Riviere-Saint-Francois are March, February, January and April, with each month seeing an average of 409 cm of snowfall.