May in Sivas averages a daily high of 20.6°C with nights around 7.5°C. Expect roughly 15.8 wet days totalling 69.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sivas is July–September.
Based on SIVAS, TU (0.2km), 1995–2024. 19 years of May data.