San Cristóbal de las Casas weather in August

In August, San Cristóbal de las Casas sees average daytime highs of 25°C and overnight lows near 16°C, with 363 mm of rain across 23.2 wet days and about 12.6 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 9% of the time in August, and the air most often feels humid.

Daylight stretches from about 12 h 48 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is San Cristóbal de las Casas's 10th-clearest and 10th-windiest month. For the whole year in context, see San Cristóbal de las Casas's year-round climate.

Daytime high
25°
5th warmest
Overnight low
16°
9th coldest
Rainfall
363 mm
23.2 wet days
Daylight
12 h 36 min
5:58 AM – 6:32 PM
Cloud cover
78%
10th clearest
Wind
4 km/h
10th windiest
Solar energy
5.61 kWh/m²
Travel score
4.6
out of 10

San Cristóbal de las Casas is municipal seat of San Cristóbal, State of Chiapas, Mexico.

Founded
1528

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical August day in San Cristóbal de las Casas reaches about 25°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, August runs on par with July and about 1°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72616
82516
92516
102516
112516
122516
132516
142516
152516
162516
172516
182516
192516
202516
212516
222516
232516
242516
252516
262516
272516
282516
292516
302516
312516

San Cristóbal de las Casas weather by month

How August compares with the rest of the year at a glance. August is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 12°122.611.18.6
Feb26° / 13°71.711.48.5
Mar27° / 14°183.711.97.8
Apr28° / 15°508.612.46.7
May27° / 16°22319.212.85.1
Jun25° / 16°48625.7134.1
Jul25° / 16°30021.612.94.8
Aug25° / 16°36323.212.64.6
Sep25° / 16°42926.312.14.1
Oct24° / 15°23018.111.65.5
Nov24° / 14°587.911.27.5
Dec24° / 13°182.6118.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22773
32674
42674
52476
62377
72377
82377
92278
102278
112278
122179
132080
142080
152080
162080
172179
182278
192278
202179
212080
222080
232080
241981
251981
261882
271783
281783
291684
301585
311585

Chance of precipitation in August

Any precipitation

San Cristóbal de las Casas gets around 363 mm of rain over 23.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 75% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
167
268
368
468
569
669
770
870
970
1070
1171
1271
1371
1472
1573
1673
1774
1875
1975
2076
2177
2278
2379
2480
2581
2682
2783
2884
2985
3086
3186

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1136621
2135631
3135631
4134641
5133651
6133651
7132661
8132661
9131671
10131671
11031681
12030691
13030691
14029701
15029701
16028711
17028711
18027721
19027721
20026731
21025741
22024751
23024751
24023761
25022771
26021781
27020791
28019801
29018811
30018811
31017821

Wind in August

Winds average 4 km/h in August.

Across August, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 48 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over August. Sunrise moves from 5:54 AM to 6:00 AM, and sunset from 6:39 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:546:39
212.75:546:39
312.75:546:39
412.75:556:38
512.75:556:38
612.75:556:37
712.75:566:37
812.75:566:36
912.75:566:36
1012.65:566:35
1112.65:576:35
1212.65:576:34
1312.65:576:33
1412.65:576:33
1512.65:576:32
1612.65:586:32
1712.65:586:31
1812.55:586:30
1912.55:586:30
2012.55:586:29
2112.55:596:28
2212.55:596:28
2312.55:596:27
2412.55:596:26
2512.45:596:26
2612.45:596:25
2712.46:006:24
2812.46:006:23
2912.46:006:23
3012.46:006:22
3112.36:006:21

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.61 kWh/m².

For context, solar energy here swings from a low near 4.57 kWh/m² to a high of 6.65 kWh/m² in April across the year — August's 5.61 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.4Bright
255.4Bright
265.4Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in August

Hazard calendar for San Cristóbal de las Casas

In seasonPeak

In August, San Cristóbal de las Casas sits inside 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.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit San Cristóbal de las Casas?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.6
Sightseeing
10th-best month of the year
4.2
Beach & pool
10th-best month of the year

August is a reasonable time to visit San Cristóbal de las Casas for sightseeing.

What to pack for San Cristóbal de las Casas in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, 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 23 days see rain.

rain gearlight clothessun protection

UV index in San Cristóbal de las Casas in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 12UV 14Dec 17UV 8
UV index (midday)Level
Jan9Very high
Feb13Extreme
Mar14Extreme
Apr14Extreme
May11Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in San Cristóbal de las Casas in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 2337 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb21Moderate
Mar27Moderate
Apr38Poor
May37Poor
Jun21Moderate
Jul24Moderate
Aug20Moderate
Sep19Moderate
Oct15Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

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.

3 km
392 m
16 km
2,344 m
80 km
2,842 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Teopisca 27 km · Chiapas 40 km · Venustiano Carranza 44 km · Las Rosas 50 km · Suchiapa 50 km · Tuxtla 51 km · Yajalón 59 km · Ocosingo 61 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
Catholic 78%no religion 11%other Evangelical Churches 8%Jehovah Witness 1%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).