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San Cristóbal de las Casas, Chiapas climate
Cwb Subtropical highland (dry winter)
San Cristóbal de las Casas has a remarkably steady mild-temperate climate (Subtropical highland (dry winter), Köppen Cwb). The hottest month is June with an average daily high near 22°C, while the coldest is January averaging around 5°C at night. Precipitation totals about 1141 mm a year and is strongly seasonal — June alone averages 238 mm while January barely receives 4 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)San Cristóbal de las Casas climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 22 | 23 | 24 | 23 | 22 | 22 | 23 | 22 | 22 | 21 | 21 |
| Avg temp (°C) | 13 | 14 | 15 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 14 | 13 |
| Avg low (°C) | 5 | 5 | 7 | 9 | 11 | 12 | 11 | 11 | 12 | 10 | 8 | 6 |
| Precipitation (mm) | 4 | 9 | 18 | 36 | 138 | 238 | 142 | 178 | 229 | 107 | 33 | 9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 21 | 22 | 23 | 24 | 23 | 22 |
| Avg temp (°C) | 13 | 14 | 15 | 16 | 17 | 17 |
| Avg low (°C) | 5 | 5 | 7 | 9 | 11 | 12 |
| Precipitation (mm) | 4 | 9 | 18 | 36 | 138 | 238 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 23 | 22 | 22 | 21 | 21 |
| Avg temp (°C) | 17 | 17 | 17 | 16 | 14 | 13 |
| Avg low (°C) | 11 | 11 | 12 | 10 | 8 | 6 |
| Precipitation (mm) | 142 | 178 | 229 | 107 | 33 | 9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 40 | 39 | 46 | 66 | 79 | 72 | 72 | 79 | 67 | 51 | 42 |
| Relative humidity (%) | 77 | 71 | 65 | 63 | 71 | 82 | 82 | 83 | 86 | 86 | 84 | 82 |
| Wind speed (mph) | 3.7 | 3.4 | 3.6 | 3.2 | 2.6 | 2.3 | 2.6 | 2.3 | 2.1 | 2.6 | 3.4 | 3.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 40 | 39 | 46 | 66 | 79 |
| Relative humidity (%) | 77 | 71 | 65 | 63 | 71 | 82 |
| Wind speed (mph) | 3.7 | 3.4 | 3.6 | 3.2 | 2.6 | 2.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 72 | 79 | 67 | 51 | 42 |
| Relative humidity (%) | 82 | 83 | 86 | 86 | 84 | 82 |
| Wind speed (mph) | 2.6 | 2.3 | 2.1 | 2.6 | 3.4 | 3.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at La Cabaña, about 2 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.