September in Gyumri averages a daily high of 20.5°C with nights around 7.1°C. Expect roughly 4.8 wet days totalling 39mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Gyumri is June–September.
Based on AMASIA, AM (1.6km), 1995–2024. 22 years of September data.