January in Ishim averages a daily high of -13.3°C with nights around -22.1°C. Expect roughly 11.7 wet days totalling 18.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Ishim is May–August.
Based on ISCHIM AMSG, RS (3.8km), 1995–2024. 25 years of January data.