April in Kostanay averages a daily high of 11.3°C with nights around 0.3°C. Expect roughly 6.9 wet days totalling 29.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kostanay is May–September.
Based on KUSTANAI, KZ (0.6km), 1995–2024. 12 years of April data.