May in San Cristóbal de Las Casas sees daytime temperatures around 27°C (81°F) and lows of 16°C (61°F) at night. Being part of the rainy season, heavy rainfall is a regular part of the day, so pack accordingly.
For San Cristóbal de Las Casas itself, January, February, March, April, November and December generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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Pick a month to see the average temperature, rainfall and sunshine in San Cristóbal de Las Casas - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in San Cristóbal de Las Casas typically stay consistent throughout May, with daily highs averaging around 27°C (81°F). Nights are cool, with lows typically ranging from 12°C (54°F) to 15°C (59°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for San Cristóbal de Las Casas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in San Cristóbal de Las Casas between 1976 and 2026, these are the recorded extremes during May.
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full San Cristóbal de Las Casas climate overview or explore weather in Mexico.
Where to go in May - average daytime high across popular destinations.
San Miguel de Allende
32°C (90°F) Los Cabos
32°C (90°F) Puerto Vallarta30°C (86°F) Playa del Carmen
30°C (86°F) Tulum30°C (86°F) Cancún30°C (86°F) Puerto Peñasco28°C (82°F) Mexico City26°C (79°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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