September in Semey averages a daily high of 20.8°C with nights around 5.6°C. Expect roughly 5 wet days totalling 14.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Semey is August–September.
Based on SEMEJ, KZ (3.6km), 1995–2024. 30 years of September data.