August in Omsk averages a daily high of 22.9°C with nights around 11.8°C. Expect roughly 11.6 wet days totalling 54.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Omsk is May–September.
Based on OMSK, RS (2.9km), 1995–2024. 24 years of August data.