August in Kostanay averages a daily high of 25.2°C with nights around 13°C. Expect roughly 9 wet days totalling 39.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kostanay is May–September.
Based on KUSTANAI, KZ (0.6km), 1995–2024. 14 years of August data.