Iztapalapa weather in September

In September, Iztapalapa sees average daytime highs of 20°C and overnight lows near 11°C, with 273 mm of rain across 23.6 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 3rd-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 3% 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 Iztapalapa's 12th-clearest and 9th-windiest month. For the whole year in context, see Iztapalapa's year-round climate.

Daytime high
20°
8th warmest
Overnight low
11°
11th coldest
Rainfall
273 mm
23.6 wet days
Daylight
12 h 06 min
6:27 AM – 6:34 PM
Cloud cover
81%
12th clearest
Wind
5 km/h
9th windiest
Solar energy
5.14 kWh/m²
Travel score
4.1
out of 10

Iztapalapa is central historical city of Iztapalapa, Mexico City.

Air quality
High
PM2.5 26.1 µg/m³ · 2016
Density
15,823/km²
people per km²
Founded
1928

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 Iztapalapa reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°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)
12011
22011
32011
42011
52011
62011
72011
82011
92011
102011
112011
122011
132011
142011
152011
162011
172011
182011
192011
202011
212011
222011
232010
242010
252010
262010
272010
282010
292010
302010

Iztapalapa weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 193.4117.3
Feb20° / 173.511.37.8
Mar22° / 225.211.97.8
Apr23° / 406.912.47.5
May23° / 10°7912.512.96.6
Jun22° / 11°24320.113.14.9
Jul20° / 10°3452713.13.8
Aug20° / 10°33726.512.73.8
Sep20° / 11°27323.612.14.1
Oct20° / 1201411.65.6
Nov19° / 355.711.17.0
Dec19° / 122.210.97.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21486
31486
41387
51387
61486
71585
81585
91585
101585
111585
121684
131684
141684
151684
161585
171684
181684
191783
201783
211783
221882
231882
241882
251981
261981
272080
282080
292179
302179

Chance of precipitation in September

Any precipitation

Iztapalapa gets around 273 mm of rain over 23.6 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 77% and peaks near 85% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
185
285
385
485
585
685
785
884
984
1084
1183
1282
1382
1481
1580
1679
1778
1877
1976
2075
2174
2273
2371
2470
2568
2667
2766
2865
2964
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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
18812
28812
38812
48812
58812
68812
78812
88812
98812
108812
118713
128713
138713
148713
158713
168713
178713
188713
198713
208713
218812
228812
238812
248911
258911
269010
279010
28919
29919
30928

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
296calm
306calm

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 6:24 AM to 6:30 AM, and sunset from 6:48 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:246:48
212.46:256:47
312.46:256:46
412.36:256:45
512.36:256:44
612.36:256:43
712.36:266:42
812.36:266:41
912.26:266:40
1012.26:266:39
1112.26:266:39
1212.26:276:38
1312.26:276:37
1412.16:276:36
1512.16:276:35
1612.16:276:34
1712.16:286:33
1812.16:286:32
1912.16:286:31
2012.06:286:30
2112.06:286:29
2212.06:286:28
2312.06:296:27
2412.06:296:26
2511.96:296:25
2611.96:296:25
2711.96:306:24
2811.96:306:23
2911.96:306:22
3011.86:306:21

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 4.99 kWh/m² to a high of 6.91 kWh/m² in April across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Iztapalapa

In seasonPeak

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

Iztapalapa's monsoon runs June–September, 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 Iztapalapa?

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

4.1
Sightseeing
10th-best month of the year
2.1
Beach & pool
11th-best month of the year

September is a reasonable time to visit Iztapalapa for sightseeing.

What to pack for Iztapalapa in September

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

In September, Iztapalapa sees daytime highs around 20°C and nights near 11°C. Pack rain gear. Worth having: sun protection. About 24 days see rain.

rain gearsun protection

UV index in Iztapalapa 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 Iztapalapa peaks around April 9 at about 14 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 9UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar14Extreme
Apr14Extreme
May11Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Iztapalapa 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 Iztapalapa is worst in December — around 33 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Iztapalapa's WHO annual average of 26.1 µg/m³.

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateDec 1133 µg/m³Apr 1421 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb26Moderate
Mar24Moderate
Apr21Moderate
May25Moderate
Jun24Moderate
Jul25Moderate
Aug24Moderate
Sep25Moderate
Oct26Moderate
Nov33Moderate
Dec33Moderate
Location & terrain

Where is Iztapalapa?

Iztapalapa sits at 19.4°N, 99.1°W, 2,238 m above sea level, in Mexico. The nearest listed city is Iztacalco, 6.0 km away.

Topography around Iztapalapa

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

Within 3 km, the terrain around Iztapalapa has only modest variations in elevation — a maximum elevation change of 210 m around an average of 2,241 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 526 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,477 m.

The land around Iztapalapa is covered by artificial surfaces (87%) within 3 km, artificial surfaces (70%) within 16 km, and trees (33%) and cropland (28%) within 80 km.

3 km
210 m
16 km
526 m
80 km
4,477 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Iztacalco 6.0 km · Ciudad Nezahualcoyotl 7.0 km · Colonia Nativitas 8.0 km · Los Reyes Acaquilpan 9.0 km · Emiliano Zapata 9.0 km · Tláhuac 10 km · Benito Juárez 10 km · Coyoacán 10 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 Iztapalapa (19.3553°, -99.0622°, elevation 2,238 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).