January in Omsk averages a daily high of -13.5°C with nights around -21.9°C. Expect roughly 12.2 wet days totalling 20.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Omsk is May–September.
Based on OMSK, RS (2.9km), 1995–2024. 25 years of January data.