Ciudad de Allende weather in September

In September, Ciudad de Allende sees average daytime highs of 28°C and overnight lows near 18°C, with 195 mm of rain across 15.6 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 38% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 30 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 de Allende's 12th-clearest and 12th-windiest month. For the whole year in context, see Ciudad de Allende's year-round climate.

Daytime high
28°
5th warmest
Overnight low
18°
9th coldest
Rainfall
195 mm
15.6 wet days
Daylight
12 h 06 min
6:30 AM – 6:39 PM
Cloud cover
53%
12th clearest
Wind
5 km/h
12th windiest
Solar energy
5.3 kWh/m²
Travel score
5.5
out of 10

Ciudad de Allende is municipal seat of Allende, State of Nuevo León, Mexico.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 27°C by the end.

A typical September day in Ciudad de Allende reaches about 28°C in the afternoon and slips back to 18°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
52919
62919
72919
82919
92819
102818
112818
122818
132818
142818
152818
162818
172818
182818
192818
202718
212718
222718
232717
242717
252717
262717
272717
282717
292717
302717

How September really feels in Ciudad de Allende

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.

Ciudad de Allende weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 487.910.66.5
Feb21° / 639.111.16.7
Mar23° / 11°9512.311.86.8
Apr26° / 14°12913.412.66.2
May28° / 17°12213.613.25.5
Jun30° / 19°779.413.55.2
Jul31° / 19°788.413.45.0
Aug31° / 19°63912.94.9
Sep28° / 18°19515.612.25.5
Oct25° / 15°1021011.47.1
Nov22° / 11°53810.87.2
Dec19° / 386.410.56.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25644
35644
45545
55446
65446
75347
85248
95248
105248
115248
125248
135248
145248
155248
165347
175347
185347
195446
205545
215545
225644
235842
245941
256139
266238
276337
286337
296535
306535

Chance of precipitation in September

Any precipitation

Ciudad de Allende gets around 195 mm of rain over 15.6 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 50% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
248
350
451
552
654
755
856
956
1057
1157
1257
1357
1456
1556
1655
1754
1853
1952
2051
2149
2248
2346
2444
2543
2641
2740
2839
2938
3037

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11835551
21834561
31834552
41733572
51732582
61732582
71731592
81631593
91630603
101630603
111630603
121630603
131730593
141730593
151730593
161830583
172830573
182930572
1921030562
2031130542
2141130532
2241230522
2351330511
2461430481
2571531471
2671631451
2781631431
2881732421
2991732411
3091833391

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
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
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 30 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 42 minutes over September. Sunrise moves from 6:24 AM to 6:36 AM, and sunset from 6:55 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:246:55
212.56:256:54
312.56:256:53
412.46:256:52
512.46:266:51
612.46:266:50
712.46:276:49
812.36:276:48
912.36:276:47
1012.36:286:46
1112.36:286:44
1212.26:286:43
1312.26:296:42
1412.26:296:41
1512.26:306:40
1612.16:306:39
1712.16:306:38
1812.16:316:37
1912.16:316:35
2012.06:326:34
2112.06:326:33
2212.06:326:32
2312.06:336:31
2411.96:336:30
2511.96:346:29
2611.96:346:28
2711.96:346:26
2811.86:356:25
2911.86:356:24
3011.86:366:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.3 kWh/m².

For context, solar energy here swings from a low near 3.69 kWh/m² to a high of 6.74 kWh/m² in June across the year — September's 5.3 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Ciudad de Allende?

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

5.5
Sightseeing
8th-best month of the year
6.1
Beach & pool
6th-best month of the year

September is a reasonable time to visit Ciudad de Allende for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ciudad de Allende in September

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

In September, Ciudad de Allende sees daytime highs around 28°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Ciudad de Allende in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (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 de Allende peaks around June 19 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 19UV 12Dec 19UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep10Extreme
Oct9Very high
Nov6High
Dec5High

Air quality in Ciudad de Allende 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 de Allende is worst in May — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1919 µg/m³Oct 2113 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar15Moderate
Apr15Moderate
May19Moderate
Jun17Moderate
Jul18Moderate
Aug16Moderate
Sep16Moderate
Oct13Moderate
Nov13Moderate
Dec15Moderate
Location & terrain

Where is Ciudad de Allende?

Ciudad de Allende sits at 25.3°N, 100.0°W, 469 m above sea level, in Mexico. The nearest listed city is Santiago, 21 km away.

Topography around Ciudad de Allende

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

Within 3 km, the terrain around Ciudad de Allende has only modest variations in elevation — a maximum elevation change of 147 m around an average of 456 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,478 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,555 m.

The land around Ciudad de Allende is covered by trees (45%) and artificial surfaces (26%) within 3 km, trees (76%) within 16 km, and shrubs (43%) and trees (38%) within 80 km.

3 km
147 m
16 km
2,478 m
80 km
3,555 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Santiago 21 km · Montemorelos 22 km · Cadereyta 34 km · Cadereyta Jiménez 34 km · Ciudad Benito Juárez 41 km · Jardines de la Silla 42 km · Guadalupe 50 km · Monterrey 54 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 de Allende (25.2812°, -100.0193°, elevation 469 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).