Climate averages 1991–2020
San Cristóbal de las Casas weather
in August.
A mild, very wet month: the joint 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in San Cristóbal de las Casas: daytime highs average 21.0°C and nights cool to about 12.9°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 363 mm of rain on roughly 23 days, which makes August a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 41 min on an average August day.
The nearest other city in this atlas is Tuxtla (51 km away). In August its highs average 29.2°C, 8.2°C warmer than San Cristóbal de las Casas, with 326 mm of rain.
Among the 153 cities listed in Mexico, San Cristóbal de las Casas ranks 147th of 153 for the warmest August highs and 150th of 153 for the driest August (rainfall, lowest first). The mean August high of those 153 cities is 27.9°C; San Cristóbal de las Casas is 6.9°C cooler than that mean.
From August to September, average highs fall by 0.7°C to 20.3°C, and monthly rainfall rises from 363 mm to 429 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Tuxtla in AugustMexico · 51 kmHigh 29.2°C · Low 21.4°C · 326 mm rain
- Comitán in AugustMexico · 76 kmHigh 24.7°C · Low 16.0°C · 222 mm rain
- Villahermosa in AugustMexico · 143 kmHigh 32.6°C · Low 24.9°C · 210 mm rain
- Cárdenas, Mexico in AugustMexico · 162 kmHigh 31.6°C · Low 24.4°C · 227 mm rain
- Paraiso in AugustMexico · 196 kmHigh 32.0°C · Low 25.3°C · 158 mm rain
- Huehuetenango in AugustGuatemala · 200 kmHigh 22.2°C · Low 12.6°C · 157 mm rain
- Tapachula in AugustMexico · 207 kmHigh 28.9°C · Low 20.9°C · 571 mm rain
- Malacatán in AugustGuatemala · 212 kmHigh 27.2°C · Low 18.3°C · 381 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.