September in Osh averages a daily high of 27.2°C with nights around 13°C. Rain is rare — about 1 wet days and 1.9mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Osh is April–May.
Based on KARA SUU, KG (11.7km), 1995–2024. 26 years of September data.