May in Les Rivières averages a daily high of 17.6°C with nights around 6.5°C. Expect roughly 12 wet days totalling 81.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Les Rivières is June–September.
Based on STE FOY U. LAVAL, QC CA (4km), 1995–2024. 26 years of May data.