May in Blois averages a daily high of 19.8°C with nights around 9.6°C. Expect roughly 11.5 wet days totalling 61.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Blois is May–September.
Based on TOURS, FR (48.2km), 1995–2024. 30 years of May data.