| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 22° | 6.1° | 3.1mm | 2.3 | 95 |
| February | 23.4° | 5.8° | 9mm | 2.7 | 95 |
| March | 24.6° | 7.5° | 16.9mm | 2.9 | 94 |
| April | 26.1° | 9° | 33.1mm | 6 | 88 |
| May | 25.9° | 11° | 108.8mm | 12.2 | 76 |
| June | 24.7° | 11.9° | 155.2mm | 15.3 | 70 |
| July | 24.6° | 11.2° | 102.6mm | 12.9 | 74 |
| August | 24.8° | 11.5° | 131.3mm | 13.6 | 73 |
| September | 24.5° | 11.9° | 134.6mm | 15.4 | 70 |
| October | 23.2° | 10.8° | 59.9mm | 10 | 80 |
| November | 22.2° | 8° | 11.2mm | 3.9 | 92 |
| December | 21.9° | 6.3° | 6.7mm | 2.2 | 96 |
January in San Cristóbal de las Casas averages a daily high of 22°C with nights around 6.1°C. Rain is rare — about 2.3 wet days and 3.1mm across the month. Comfortable conditions for being outdoors all day.
February in San Cristóbal de las Casas averages a daily high of 23.4°C with nights around 5.8°C. Rain is rare — about 2.7 wet days and 9mm across the month. Comfortable conditions for being outdoors all day.
March in San Cristóbal de las Casas averages a daily high of 24.6°C with nights around 7.5°C. Rain is rare — about 2.9 wet days and 16.9mm across the month. Comfortable conditions for being outdoors all day.
April in San Cristóbal de las Casas averages a daily high of 26.1°C with nights around 9°C. Expect roughly 6 wet days totalling 33.1mm. Comfortable conditions for being outdoors all day.
May in San Cristóbal de las Casas averages a daily high of 25.9°C with nights around 11°C. Expect roughly 12.2 wet days totalling 108.8mm. Comfortable conditions for being outdoors all day.
June in San Cristóbal de las Casas averages a daily high of 24.7°C with nights around 11.9°C. Expect roughly 15.3 wet days totalling 155.2mm. Generally workable, with some weather to plan around.
July in San Cristóbal de las Casas averages a daily high of 24.6°C with nights around 11.2°C. Expect roughly 12.9 wet days totalling 102.6mm. Generally workable, with some weather to plan around.
August in San Cristóbal de las Casas averages a daily high of 24.8°C with nights around 11.5°C. Expect roughly 13.6 wet days totalling 131.3mm. Generally workable, with some weather to plan around.
September in San Cristóbal de las Casas averages a daily high of 24.5°C with nights around 11.9°C. Expect roughly 15.4 wet days totalling 134.6mm. Generally workable, with some weather to plan around.
October in San Cristóbal de las Casas averages a daily high of 23.2°C with nights around 10.8°C. Expect roughly 10 wet days totalling 59.9mm. Comfortable conditions for being outdoors all day.
November in San Cristóbal de las Casas averages a daily high of 22.2°C with nights around 8°C. Expect roughly 3.9 wet days totalling 11.2mm. Comfortable conditions for being outdoors all day.
December in San Cristóbal de las Casas averages a daily high of 21.9°C with nights around 6.3°C. Rain is rare — about 2.2 wet days and 6.7mm across the month. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. San Cristóbal de las Casas peaks at 96.
Based on 30 years of records, November–April scores highest for comfort in San Cristóbal de las Casas, balancing daytime temperature against rainfall.
April is the warmest, averaging a daily high of 26.1°C.
June is the wettest, averaging 155.2mm of rain across roughly 15.3 wet days.
December is the coolest month, with average daily highs around 21.9°C.