Comalapa weather in September

In September, Comalapa sees average daytime highs of 28°C and overnight lows near 19°C, with 242 mm of rain across 22.4 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 2nd-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 6% 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 Comalapa's 11th-clearest and 12th-windiest month. For the whole year in context, see Comalapa's year-round climate.

Daytime high
28°
8th warmest
Overnight low
19°
10th coldest
Rainfall
242 mm
22.4 wet days
Daylight
12 h 06 min
6:00 AM – 6:05 PM
Cloud cover
80%
11th clearest
Wind
3 km/h
12th windiest
Solar energy
5.12 kWh/m²
Travel score
4.0
out of 10

Comalapa is municipal seat of Frontera Comalapa, State of Chiapas, Mexico.

Founded
1600

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 Comalapa reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, September runs about 1°C cooler than August and about 1°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
52919
62919
72919
82919
92919
102919
112919
122919
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262819
272819
282819
292819
302819

How September really feels in Comalapa

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Comalapa weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 15°92.411.27.9
Feb29° / 16°61.811.56.7
Mar31° / 17°92.311.95.5
Apr33° / 19°285.112.34.3
May31° / 20°10512.912.73.9
Jun29° / 20°26123.312.93.7
Jul29° / 19°11915.712.84.4
Aug30° / 19°15616.712.54.2
Sep28° / 19°24222.412.14.0
Oct28° / 19°1351611.65.4
Nov28° / 17°326.111.37.2
Dec28° / 16°153.411.17.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11981
21981
31981
41981
51981
61882
71882
81882
91882
101882
111882
121882
131882
141783
151783
161783
171783
181882
191882
201783
211783
221684
231684
241684
251684
261783
271882
281882
291981
301981

Chance of precipitation in September

Any precipitation

Comalapa gets around 242 mm of rain over 22.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 73% and peaks near 75% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
170
271
372
473
573
674
774
873
973
1073
1172
1272
1372
1472
1572
1672
1773
1873
1974
2074
2174
2275
2375
2475
2575
2675
2775
2874
2974
3073

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 61% of days. Sticky, muggy-or-worse air turns up on roughly 61% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)
193952
283953
373954
463955
553956
653956
743957
843858
933859
1033859
1133859
1233760
1333760
1423662
1523563
1623563
1723464
1823365
1923365
2023365
2123365
2223365
2313366
2413465
2513465
2613564
2713663
2813663
2913762
3013861

Wind in September

Winds average 3 km/h in September, the calmest month.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

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 5:59 AM to 6:02 AM, and sunset from 6:18 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:596:18
212.35:596:17
312.35:596:16
412.35:596:15
512.35:596:14
612.25:596:14
712.26:006:13
812.26:006:12
912.26:006:11
1012.26:006:10
1112.26:006:10
1212.16:006:09
1312.16:006:08
1412.16:006:07
1512.16:006:06
1612.16:006:05
1712.16:006:05
1812.16:006:04
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 5.12 kWh/m².

For context, solar energy here swings from a low near 4.95 kWh/m² to a high of 6.81 kWh/m² in April across the year — September's 5.12 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Comalapa

In seasonPeak

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

Comalapa's monsoon runs June–October, when most of the year's rain falls.

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

Is September a good time to visit Comalapa?

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

4.0
Sightseeing
10th-best month of the year
4.8
Beach & pool
11th-best month of the year

September is a reasonable time to visit Comalapa for sightseeing.

What to pack for Comalapa in September

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

In September, Comalapa sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Comalapa in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Comalapa peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 13UV 14Dec 16UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar13Extreme
Apr15Extreme
May12Extreme
Jun14Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Comalapa 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 Comalapa is worst in May — around 40 µg/m³ PM2.5 (poor), about 3.4× the cleanest month (January, 12 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1439 µg/m³Jan 1612 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar18Moderate
Apr32Moderate
May40Poor
Jun23Moderate
Jul21Moderate
Aug19Moderate
Sep20Moderate
Oct16Moderate
Nov14Moderate
Dec12Moderate
Location & terrain

Where is Comalapa?

Comalapa sits at 15.7°N, 92.1°W, 659 m above sea level, in Mexico. The nearest listed city is Motozintla, 35 km away.

Topography around Comalapa

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

Within 3 km, the terrain around Comalapa has large variations in elevation — a maximum elevation change of 646 m around an average of 692 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,926 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,175 m.

The land around Comalapa is covered by trees (49%) and grassland (28%) within 3 km, trees (66%) and grassland (23%) within 16 km, and trees (71%) within 80 km.

3 km
646 m
16 km
1,926 m
80 km
4,175 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Motozintla 35 km · Jacaltenango 46 km · Comitán 64 km · Huixtla 67 km · Cacahoatán 74 km · Las Margaritas 75 km · Comitancillo 76 km · Soloma 76 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 Comalapa (15.66°, -92.1411°, elevation 659 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).