Ciudad Serdán weather in September

In September, Ciudad Serdán sees average daytime highs of 20°C and overnight lows near 10°C, with 185 mm of rain across 21 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Ciudad Serdán's 12th-clearest and 10th-windiest month. For the whole year in context, see Ciudad Serdán's year-round climate.

Daytime high
20°
7th warmest
Overnight low
10°
11th coldest
Rainfall
185 mm
21 wet days
Daylight
12 h 06 min
6:21 AM – 6:27 PM
Cloud cover
78%
12th clearest
Wind
6 km/h
10th windiest
Solar energy
5.32 kWh/m²
Travel score
4.5
out of 10

Ciudad Serdán is municipal seat of Chalchicomula, State of Puebla, Mexico.

Density
65/km²
people per km²
Founded
1560

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 20°C through the month.

A typical September day in Ciudad Serdán reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 22°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12110
22110
32010
42010
52010
62010
72010
82010
92010
102010
112010
122011
132011
142011
152011
162011
172011
182011
192011
202011
212011
222011
232011
242011
252011
262010
272010
282010
292010
302010

Ciudad Serdán weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 123.3117.3
Feb20° / 123.111.47.7
Mar21° / 297.611.97.3
Apr22° / 6512.912.46.4
May22° / 10°1201912.95.4
Jun21° / 11°20920.313.14.8
Jul21° / 13016.5135.3
Aug21° / 10°14919.312.65.0
Sep20° / 10°1852112.14.5
Oct20° / 9714.611.65.6
Nov19° / 297.111.16.8
Dec19° / 92.710.97.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12278
22278
32179
42179
52080
62080
72080
82080
92179
102179
112179
122179
132278
142278
152278
162278
172278
182278
192278
202278
212278
222179
232278
242278
252278
262476
272476
282575
292575
302575

Chance of precipitation in September

Any precipitation

Ciudad Serdán gets around 185 mm of rain over 21 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 68% and peaks near 73% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
270
371
471
572
672
772
873
973
1072
1172
1271
1371
1470
1569
1669
1768
1868
1968
2067
2167
2266
2366
2465
2565
2664
2764
2863
2963
3063

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1964
2964
3955
4955
5955
6946
7946
8946
9946
10946
11937
12937
13937
14937
15937
16937
17937
18937
19937
20937
21946
22946
23946
24955
25955
26955
27964
28964
29964
30973

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over September. Sunrise moves from 6:18 AM to 6:24 AM, and sunset from 6:41 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:186:41
212.46:186:40
312.36:196:39
412.36:196:38
512.36:196:37
612.36:196:36
712.36:196:36
812.36:196:35
912.26:206:34
1012.26:206:33
1112.26:206:32
1212.26:206:31
1312.26:206:30
1412.16:216:29
1512.16:216:28
1612.16:216:27
1712.16:216:26
1812.16:216:25
1912.16:216:25
2012.06:226:24
2112.06:226:23
2212.06:226:22
2312.06:226:21
2412.06:226:20
2511.96:236:19
2611.96:236:18
2711.96:236:17
2811.96:236:16
2911.96:236:15
3011.86:246:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.32 kWh/m².

For context, solar energy here swings from a low near 4.82 kWh/m² to a high of 6.92 kWh/m² in April across the year — September's 5.32 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Ciudad Serdán

In seasonPeak

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

Ciudad Serdán'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 September a good time to visit Ciudad Serdán?

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

4.5
Sightseeing
12th-best month of the year
2.5
Beach & pool
12th-best month of the year

September is a reasonable time to visit Ciudad Serdán for sightseeing.

What to pack for Ciudad Serdán in September

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

In September, Ciudad Serdán sees daytime highs around 20°C and nights near 10°C. Pack rain gear. Worth having: sun protection. About 21 days see rain.

rain gearsun protection

UV index in Ciudad Serdán 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 Ciudad Serdán peaks around April 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeVery highApr 11UV 15Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar14Extreme
Apr15Extreme
May9Very high
Jun14Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in Ciudad Serdán 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 Ciudad Serdán is worst in May — around 38 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (January, 20 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateMay 1737 µg/m³Jan 2220 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb20Moderate
Mar23Moderate
Apr29Moderate
May38Poor
Jun30Moderate
Jul25Moderate
Aug22Moderate
Sep25Moderate
Oct22Moderate
Nov22Moderate
Dec23Moderate
Location & terrain

Where is Ciudad Serdán?

Ciudad Serdán sits at 19.0°N, 97.4°W, 2,548 m above sea level, in Mexico. The nearest listed city is Palmarito Tochapan, 22 km away.

Topography around Ciudad Serdán

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

Within 3 km, the terrain around Ciudad Serdán has significant variations in elevation — a maximum elevation change of 273 m around an average of 2,591 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,346 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,479 m.

The land around Ciudad Serdán is covered by grassland (37%) and cropland (26%) within 3 km, cropland (41%) and grassland (30%) within 16 km, and trees (36%), shrubs (23%) and cropland (21%) within 80 km.

3 km
273 m
16 km
2,346 m
80 km
5,479 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Palmarito Tochapan 22 km · San Salvador El Seco 26 km · Tecamachalco 32 km · Ciudad Mendoza 35 km · Nogales 35 km · Río Blanco 35 km · Acatzingo 35 km · Los Reyes de Juárez 38 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 Ciudad Serdán (18.9886°, -97.4464°, elevation 2,548 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).