May in San Cristóbal de las Casas averages a daily high of 25.9°C with nights around 11°C. Expect roughly 12.2 wet days totalling 108.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit San Cristóbal de las Casas is November–April.
Based on SN. CRISTOBAL LAS CASAS CHIS, MX (2.3km), 1995–2024. 18 years of May data.