May in Gatineau averages a daily high of 19°C with nights around 6.5°C. Expect roughly 11.6 wet days totalling 79.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gatineau is May–September.
Based on CHELSEA, QC CA (7.7km), 1995–2024. 21 years of May data.