May in Gyumri averages a daily high of 15.5°C with nights around 4.2°C. Expect roughly 13 wet days totalling 93.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gyumri is June–September.
Based on AMASIA, AM (1.6km), 1995–2024. 21 years of May data.