Climate averages 1991–2020
San Cristóbal de las Casas weather
in May.
A warm, very wet month: the 3rd warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in San Cristóbal de las Casas: daytime highs average 22.2°C and nights cool to about 13.0°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 223 mm of rain on roughly 19 days, which makes May a very wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 54 min on an average May day.
The nearest other city in this atlas is Tuxtla (51 km away). In May its highs average 32.0°C, 9.8°C warmer than San Cristóbal de las Casas, with 158 mm of rain.
Among the 153 cities listed in Mexico, San Cristóbal de las Casas ranks 147th of 153 for the warmest May highs and 151st of 153 for the driest May (rainfall, lowest first). The mean May high of those 153 cities is 29.6°C; San Cristóbal de las Casas is 7.4°C cooler than that mean.
From May to June, average highs fall by 1.4°C to 20.8°C, and monthly rainfall rises from 223 mm to 486 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Cristóbal de las Casas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.6°C9.7°C | 9.7°C | 12 | 2.6 | 11.211 h |
| February | 21.3°C10.1°C | 10.1°C | 7.3 | 1.8 | 11.612 h |
| March | 22.9°C11.0°C | 11.0°C | 17 | 3.7 | 12.012 h |
| April | 23.4°C12.2°C | 12.2°C | 50 | 8.6 | 12.513 h |
| May, selected | 22.2°C13.0°C | 13.0°C | 223 | 19.2 | 12.913 h |
| June | 20.8°C13.3°C | 13.3°C | 486 | 25.7 | 13.113 h |
| July | 21.0°C12.8°C | 12.8°C | 300 | 21.6 | 13.013 h |
| August | 21.0°C12.9°C | 12.9°C | 363 | 23.2 | 12.713 h |
| September | 20.3°C13.1°C | 13.1°C | 429 | 26.3 | 12.212 h |
| October | 19.9°C12.5°C | 12.5°C | 230 | 18.1 | 11.812 h |
| November | 19.5°C11.1°C | 11.1°C | 58 | 7.9 | 11.411 h |
| December | 19.7°C10.2°C | 10.2°C | 18 | 2.5 | 11.211 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Tuxtla in MayMexico · 51 kmHigh 32.0°C · Low 22.2°C · 158 mm rain
- Comitán in MayMexico · 76 kmHigh 26.2°C · Low 16.0°C · 154 mm rain
- Villahermosa in MayMexico · 143 kmHigh 34.8°C · Low 25.4°C · 91 mm rain
- Cárdenas, Mexico in MayMexico · 162 kmHigh 34.1°C · Low 24.9°C · 84 mm rain
- Paraiso in MayMexico · 196 kmHigh 34.4°C · Low 25.9°C · 50 mm rain
- Huehuetenango in MayGuatemala · 200 kmHigh 23.9°C · Low 13.1°C · 166 mm rain
- Tapachula in MayMexico · 207 kmHigh 29.8°C · Low 21.8°C · 414 mm rain
- Malacatán in MayGuatemala · 212 kmHigh 27.9°C · Low 19.0°C · 318 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Cristóbal de las Casas) is explained once on the San Cristóbal de las Casas year overview and on the Sources, method and limits page.