Allende weather in September

In September, Allende sees average daytime highs of 33°C and overnight lows near 23°C, with 80 mm of rain across 9.1 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 34°C in the first days to 32°C by the end. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Allende's 6th-clearest and 9th-windiest month. For the whole year in context, see Allende's year-round climate.

Daytime high
33°
5th warmest
Overnight low
23°
9th coldest
Rainfall
80 mm
9.1 wet days
Daylight
12 h 12 min
6:33 AM – 6:43 PM
Cloud cover
45%
6th clearest
Wind
13 km/h
9th windiest
Solar energy
5.29 kWh/m²
Travel score
3.8
out of 10

Allende is municipal seat of Allende, State of Coahuila, Mexico.

Founded
1826

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 34°C in the first days to 32°C by the end.

A typical September day in Allende reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 37°C. Set against its neighbours, September runs about 4°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13524
23524
33424
43424
53424
63424
73424
83423
93323
103323
113323
123323
133323
143323
153323
163323
173322
183222
193222
203222
213222
223222
233222
243221
253221
263221
273221
283221
293121
303121

How September really feels in Allende

Once humidity and wind are folded in, September averages 26 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
26
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

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° / 203.710.47.2
Feb22° / 10°234.1117.7
Mar26° / 14°35511.87.6
Apr30° / 18°425.412.75.5
May33° / 22°749.413.43.5
Jun36° / 24°476.613.82.3
Jul36° / 25°536.113.62.0
Aug36° / 25°454.8132.1
Sep33° / 23°809.112.23.8
Oct29° / 18°575.911.36.5
Nov23° / 12°28410.68.0
Dec19° / 234.210.27.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26931
36733
46733
56733
66634
76634
86634
96535
106535
116535
126535
136535
146733
156733
166733
176832
186931
196931
207129
217129
227228
237228
247426
257525
267624
277624
287723
297723
307822

Chance of precipitation in September

Any precipitation

Allende gets around 80 mm of rain over 9.1 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 29% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
128
229
330
431
532
633
733
834
934
1034
1134
1234
1333
1433
1532
1631
1731
1830
1929
2028
2127
2227
2326
2425
2524
2623
2723
2822
2922
3022

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 65% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
134184629
234184530
334174431
444174332
544174233
654174233
753164134
853174134
953174134
1063174034
1164174033
1264174033
1364174032
1475174031
1576173931
1676183930
1787183829
1888183828
1999183727
201010183626
211011183525
221113193424
231214193323
241315193222
251415193121
261516193120
271616193019
281617193018
291717192917
301817192916

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 48 minutes over September. Sunrise moves from 6:25 AM to 6:40 AM, and sunset from 7:01 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:257:01
212.66:267:00
312.56:266:59
412.56:276:57
512.56:276:56
612.56:286:55
712.46:286:54
812.46:296:53
912.46:296:51
1012.36:306:50
1112.36:306:49
1212.36:316:48
1312.36:316:46
1412.26:326:45
1512.26:326:44
1612.26:336:43
1712.16:336:41
1812.16:346:40
1912.16:346:39
2012.16:356:38
2112.06:356:37
2212.06:366:35
2312.06:366:34
2411.96:376:33
2511.96:376:32
2611.96:386:30
2711.86:386:29
2811.86:396:28
2911.86:396:27
3011.86:406:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.29 kWh/m².

For context, solar energy here swings from a low near 3.19 kWh/m² to a high of 6.82 kWh/m² in July across the year — September's 5.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.6Bright
55.6Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Allende?

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

3.8
Sightseeing
8th-best month of the year
6.6
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Allende. The water and warmth also suit a beach or pool day.

What to pack for Allende in September

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

In September, Allende sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Allende in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Allende peaks around July 17 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 17UV 11Dec 18UV 4
UV index (midday)Level
Jan5Moderate
Feb6High
Mar8Very high
Apr10Very high
May10Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep9Very high
Oct7Very high
Nov5High
Dec4Moderate

Air quality in 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 Allende is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (February, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Feb 178 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb8Good
Mar9Good
Apr10Good
May16Moderate
Jun16Moderate
Jul18Moderate
Aug13Moderate
Sep12Good
Oct9Good
Nov10Good
Dec11Good
Location & terrain

Where is Allende?

Allende sits at 28.3°N, 100.9°W, 385 m above sea level, in Mexico. The nearest listed city is Nava, 12 km away.

Topography around Allende

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

Within 3 km, the terrain around Allende has only modest variations in elevation — a maximum elevation change of 38 m around an average of 380 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 244 m; within 80 km, large variations in elevation — a maximum elevation change of 889 m.

The land around Allende is covered by shrubs (47%) and artificial surfaces (20%) within 3 km, shrubs (70%) within 16 km, and shrubs (94%) within 80 km.

3 km
38 m
16 km
244 m
80 km
889 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Nava 12 km · Piedras Negras 51 km · Eagle Pass 53 km · Nueva Rosita 58 km · Sabinas 60 km · Palaú 75 km · Ciudad Melchor Múzquiz 83 km · Ciudad Acuña 110 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 Allende (28.3412°, -100.8511°, elevation 385 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).