May in Medicine Hat averages a daily high of 19.3°C with nights around 5°C. Expect roughly 9.3 wet days totalling 48.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Medicine Hat is July–September.
Based on MEDICINE HAT RCS, AB CA (2.9km), 1995–2024. 23 years of May data.