San Cristóbal de las Casas in Summer
In summer (June, July and August), San Cristóbal de las Casas sees average daytime highs around 25°C and overnight lows near 16°C, with 1149 mm of rain over about 71 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 25°C. The sky is clear or mostly clear about 8% of the time across summer, and the air most often feels humid.
Summer is San Cristóbal de las Casas's weakest season of the year to visit on our travel score. For the whole year in context, see San Cristóbal de las Casas's year-round climate.
- Avg daytime high
- 25°C
- 2nd-warmest season
- Avg overnight low
- 16°C
- Rainfall
- 1149 mm
- 71 wet days
- Avg wind
- 4 km/h
- Travel score
- 4.5
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in San Cristóbal de las Casas in Summer
Across summer, daytime highs hold fairly steady around 25°C.
A typical summer day in San Cristóbal de las Casas reaches about 25°C and drops to 16°C overnight. The warmest of the three months is July, the coolest July.
San Cristóbal de las Casas weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 12° | 12 | 2.6 | 11.1 | 8.6 |
| Feb | 26° / 13° | 7 | 1.7 | 11.4 | 8.5 |
| Mar | 27° / 14° | 18 | 3.7 | 11.9 | 7.8 |
| Apr | 28° / 15° | 50 | 8.6 | 12.4 | 6.7 |
| May | 27° / 16° | 223 | 19.2 | 12.8 | 5.1 |
| Jun | 25° / 16° | 486 | 25.7 | 13 | 4.1 |
| Jul | 25° / 16° | 300 | 21.6 | 12.9 | 4.8 |
| Aug | 25° / 16° | 363 | 23.2 | 12.6 | 4.6 |
| Sep | 25° / 16° | 429 | 26.3 | 12.1 | 4.1 |
| Oct | 24° / 15° | 230 | 18.1 | 11.6 | 5.5 |
| Nov | 24° / 14° | 58 | 7.9 | 11.2 | 7.5 |
| Dec | 24° / 13° | 18 | 2.6 | 11 | 8.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 8% of the time across summer.
Chance of precipitation in Summer
San Cristóbal de las Casas gets around 1149 mm of rain over 71 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 54 min in early June to 12 h 18 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.6 kWh/m².
Hazard calendar for San Cristóbal de las Casas
In summer, San Cristóbal de las Casas overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
San Cristóbal de las Casas's monsoon runs May–October, when most of the year's rain falls.
Is summer a good time to visit San Cristóbal de las Casas?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit San Cristóbal de las Casas for sightseeing.
What to pack for San Cristóbal de las Casas in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Cristóbal de las Casas sees daytime highs around 25°C and nights near 16°C. Pack rain gear. Worth having: light clothes and sun protection. About 71 days see rain.
UV index in San Cristóbal de las Casas in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Cristóbal de las Casas peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 13 | 14 | 14 | 11 | 14 | 13 | 13 | 13 | 11 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in San Cristóbal de las Casas in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in San Cristóbal de las Casas is worst in April — around 38 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (December, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 21 | 27 | 38 | 37 | 21 | 24 | 20 | 19 | 15 | 13 | 12 |
| Level | Moderate | Moderate | Moderate | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 21 | Moderate |
| Mar | 27 | Moderate |
| Apr | 38 | Poor |
| May | 37 | Poor |
| Jun | 21 | Moderate |
| Jul | 24 | Moderate |
| Aug | 20 | Moderate |
| Sep | 19 | Moderate |
| Oct | 15 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Moderate |
Where is San Cristóbal de las Casas?
San Cristóbal de las Casas sits at 16.7°N, 92.6°W, 2,183 m above sea level, in Mexico. The nearest listed city is Teopisca, 27 km away.
Topography around San Cristóbal de las Casas
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Cristóbal de las Casas.
Within 3 km, the terrain around San Cristóbal de las Casas has significant variations in elevation — a maximum elevation change of 392 m around an average of 2,158 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,344 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,842 m.
The land around San Cristóbal de las Casas is covered by artificial surfaces (60%) and trees (26%) within 3 km, trees (58%) and grassland (30%) within 16 km, and trees (62%) and grassland (27%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Cristóbal de las Casas (16.7301°, -92.6382°, elevation 2,183 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.