Climate averages 1991–2020
San Cristóbal de las Casas weather
in December.
A mild, fairly dry month: the 10th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in San Cristóbal de las Casas: daytime highs average 19.7°C and nights cool to about 10.2°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 18 mm of rain on roughly 3 days, which makes December a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 09 min on an average December day.
The nearest other city in this atlas is Tuxtla (51 km away). In December its highs average 27.1°C, 7.4°C warmer than San Cristóbal de las Casas, with 13 mm of rain.
Among the 153 cities listed in Mexico, San Cristóbal de las Casas ranks joint 127th of 153 for the warmest December highs and joint 97th of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; San Cristóbal de las Casas is 3.0°C cooler than that mean.
From December to January, average highs stay level at 19.6°C, and monthly rainfall falls from 18 mm to 12 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Tuxtla in DecemberMexico · 51 kmHigh 27.1°C · Low 18.0°C · 13 mm rain
- Comitán in DecemberMexico · 76 kmHigh 22.3°C · Low 12.7°C · 10 mm rain
- Villahermosa in DecemberMexico · 143 kmHigh 27.2°C · Low 20.4°C · 80 mm rain
- Cárdenas, Mexico in DecemberMexico · 162 kmHigh 26.7°C · Low 19.8°C · 82 mm rain
- Paraiso in DecemberMexico · 196 kmHigh 27.1°C · Low 21.2°C · 66 mm rain
- Huehuetenango in DecemberGuatemala · 200 kmHigh 20.7°C · Low 10.1°C · 15 mm rain
- Tapachula in DecemberMexico · 207 kmHigh 29.0°C · Low 19.1°C · 44 mm rain
- Malacatán in DecemberGuatemala · 212 kmHigh 27.4°C · Low 17.0°C · 42 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.