Cacahoatán weather in September

In September, Cacahoatán sees average daytime highs of 28°C and overnight lows near 20°C, with 697 mm of rain across 29.5 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Cacahoatán's 12th-clearest and 10th-windiest month. For the whole year in context, see Cacahoatán's year-round climate.

Daytime high
28°
11th warmest
Overnight low
20°
10th coldest
Rainfall
697 mm
29.5 wet days
Daylight
12 h 06 min
6:00 AM – 6:05 PM
Cloud cover
89%
12th clearest
Wind
4 km/h
10th windiest
Solar energy
4.7 kWh/m²
Travel score
3.2
out of 10

Cacahoatán is municipal seat of Cacahoatán, State of Chiapas, Mexico.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical September day in Cacahoatán reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192820
202820
212820
222820
232820
242820
252820
262820
272820
282820
292720
302720

Cacahoatán weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°184.511.26.9
Feb30° / 18°154.311.56.3
Mar30° / 19°429.211.95.3
Apr30° / 20°11916.812.34.3
May29° / 20°41427.812.73.3
Jun28° / 20°54829.112.93.0
Jul28° / 19°50630.712.82.9
Aug28° / 20°57130.612.53.0
Sep28° / 20°69729.512.13.2
Oct28° / 20°61729.911.73.4
Nov28° / 18°24521.411.34.8
Dec28° / 17°449.411.16.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of September, with mostly cloudy or overcast conditions the remaining 96%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2595
3595
4595
5595
6496
7496
8496
9496
10496
11496
12496
13397
14397
15397
16397
17397
18397
19397
20397
21397
22397
23397
24397
25397
26397
27397
28496
29496
30694

Chance of precipitation in September

Any precipitation

Cacahoatán gets around 697 mm of rain over 29.5 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 99% and peaks near 100% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
198
298
398
498
598
698
798
898
998
1098
1198
1298
1398
1498
1598
1698
1798
1899
1999
2099
2199
2299
2399
2499
2599
2699
27100
28100
29100
30100

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 74% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
17525
27624
37723
47723
57723
67723
77723
87723
97723
107624
117624
127525
137426
147327
157327
167228
177228
187228
197129
207129
217129
227129
237228
247228
257228
267228
277228
287129
297129
307129

Wind in September

Winds average 4 km/h in September.

Across September, 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.

0246810151015202530
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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 6:00 AM to 6:02 AM, and sunset from 6:17 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:006:17
212.36:006:16
312.36:006:16
412.36:006:15
512.26:006:14
612.26:006:13
712.26:006:13
812.26:006:12
912.26:006:11
1012.26:006:10
1112.26:006:09
1212.16:006:09
1312.16:006:08
1412.16:006:07
1512.16:006:06
1612.16:006:05
1712.16:016:05
1812.16:016:04
1912.06:016:03
2012.06:016:02
2112.06:016:01
2212.06:016:01
2312.06:016:00
2412.06:015:59
2512.06:015:58
2611.96:015:57
2711.96:015:57
2811.96:015:56
2911.96:015:55
3011.96:025:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.7 kWh/m².

For context, solar energy here swings from a low near 4.58 kWh/m² to a high of 6.16 kWh/m² in April across the year — September's 4.7 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.6Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Cacahoatán

In seasonPeak

In September, Cacahoatán sits inside its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.

Cacahoatán sits in the Atlantic hurricane belt; the season peaks August–October.

Cacahoatán's monsoon runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Cacahoatán?

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

3.2
Sightseeing
9th-best month of the year
3.5
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Cacahoatán.

What to pack for Cacahoatán in September

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

In September, Cacahoatán sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

Sea temperature near Cacahoatán in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 47 km away) is warmest in August at about 30°C and coldest in February near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Cacahoatán in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cacahoatán peaks around April 9 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 9UV 13Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May11Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Cacahoatán in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Cacahoatán is worst in May — around 40 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1039 µg/m³Feb 827 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb27Moderate
Mar34Moderate
Apr38Poor
May40Poor
Jun29Moderate
Jul31Moderate
Aug30Moderate
Sep31Moderate
Oct29Moderate
Nov30Moderate
Dec29Moderate
Location & terrain

Where is Cacahoatán?

Cacahoatán sits at 15.0°N, 92.2°W, 498 m above sea level, in Mexico. The nearest listed city is Tapachula, 14 km away.

Topography around Cacahoatán

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cacahoatán.

Within 3 km, the terrain around Cacahoatán has significant variations in elevation — a maximum elevation change of 297 m around an average of 488 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,692 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,178 m.

The land around Cacahoatán is covered by trees (81%) within 3 km, trees (86%) within 16 km, and trees (60%) within 80 km.

3 km
297 m
16 km
3,692 m
80 km
4,178 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Tapachula 14 km · Malacatán 15 km · Huixtla 36 km · San Marcos 40 km · Motozintla 43 km · San Pedro Sacatepéquez 43 km · Coatepeque 45 km · Comitancillo 46 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 Cacahoatán (14.992°, -92.1642°, elevation 498 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).