Climate Overview
The climate in San Cristóbal de las Casas is warm and mild. The average annual temperature is 20°C and approximately 2149mm of precipitation falls per year. June is the wettest month, receiving around 498mm of rainfall. San Cristóbal de las Casas is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, February, December, when temperatures can drop to 13°C.
Temperature
San Cristóbal de las Casas sees moderate temperature variation throughout the year, ranging from 13°C to 28°C. The warmest month is April, when average highs reach 28°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 13°C and an average of 18°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
San Cristóbal de las Casas is a very wet location, receiving approximately 2149mm of precipitation annually, which averages out to around 179mm per month. The wettest month is June, averaging 498mm of rainfall. September and August also tend to see above-average precipitation. The driest month is February, with just 11mm. That's 487mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
San Cristóbal de las Casas is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
3 days until Autumn
It is currently summer in San Cristóbal de las Casas, which began on June 21, 2026. San Cristóbal de las Casas is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 28°C, while the coldest stretch bottoms out in January near 13°C. Autumn is next, beginning on September 23, 2026 (3 days from now).
Spring
Temperatures range from 15 to 28°C. Precipitation is moderate at around 258mm for the season, averaging 86mm per month. Winds are generally light, averaging 5km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 16 to 26°C. Rainfall is heavy, totalling around 1113mm across the season with a monthly average of 371mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 14 to 25°C. Rainfall is heavy, totalling around 729mm across the season with a monthly average of 243mm. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 13 to 26°C. Rainfall is relatively light, with around 49mm over the season and a monthly average of 16mm. Winds are generally light, averaging 6km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit San Cristóbal de las Casas is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 26mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for San Cristóbal de las Casas based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
