San Cristóbal de las Casas weather in December
In December, San Cristóbal de las Casas has daytime highs averaging 20 °C, nights around 10 °C, with 3.3 wet days. Figures are 1991–2020 climate normals.
- 19.8°C Average high
- 10.5°C Average low
- 3.3days Wet days
- 19mm Rainfall
- 11h Daylight
Daily temperatures through December
How December develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 December | 19.7 °C | 10.7 °C | 12 % |
| 11–20 December | 19.8 °C | 10.6 °C | 11 % |
| 21–31 December | 19.9 °C | 10.2 °C | 10 % |
What to expect
| Measure | Typical December | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 3.3 of 31 | 11 % |
Conditions in December
| Measure | Average |
|---|---|
| Mean temperature | 14 °C |
| Record high (1991–2020) | 25 °C |
| Record low (1991–2020) | 3.6 °C |
| Relative humidity | 74 % |
| Wind speed | 8.6 km/h |
| Cloud cover | 38 % |
Where San Cristóbal de las Casas ranks in December
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in North America in December | 45thof 50 | 92/100 |
December compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 19.8 °C | 13 mm | 36 % |
| February | 21.5 °C | 9 mm | 31 % |
| October | 20.1 °C | 231 mm | 72 % |
| November | 19.7 °C | 68 mm | 51 % |
| December | 19.8 °C | 19 mm | 38 % |
See all twelve months for San Cristóbal de las Casas
- December is the 11th warmest month here.
- It is the 3rd driest month of the year.
- It ranks 4th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 3.3 of 31 days — 11 % of the month.
- Nights are about 9.3 °C cooler than the middle of the day.
- The hottest December day on record since 1991 reached 25 °C, 5.1 °C above the usual daytime high.
Nearby destinations in December
| Destination | Avg high | Wet days | Sea |
|---|---|---|---|
| San Cristóbal de las Casas | 20 °C | 3.3 | – |
| Tuxtla | 28 °C | 2 | – |
| Comitán | 22 °C | 2 | – |
| Villahermosa | 27 °C | 11 | – |
| Tapachula | 29 °C | 9 | – |
| Ciudad del Carmen | 27 °C | 7 | 25 |
| Quetzaltenango | 18 °C | 11 | – |
QuestionsDecember in San Cristóbal de las Casas, answered
How warm is San Cristóbal de las Casas in December?
Daily highs average 20 °C and nights fall to about 10 °C, a spread of 9.3 °C between afternoon and dawn. That makes December the 11th warmest month of the year here.
Does it rain much in San Cristóbal de las Casas in December?
December averages 19 mm of rain, spread over about 3 of the 31 days — 11 % of the month. Cloud cover averages 38 % of the sky.
How long are the days in December?
San Cristóbal de las Casas averages 11 hours between sunrise and sunset in December. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.