Montemorelos weather in September

In September, Montemorelos sees average daytime highs of 31°C and overnight lows near 21°C, with 167 mm of rain across 13.4 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 33°C in the first days to 30°C by the end. The sky is clear or mostly clear about 40% 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 Montemorelos's 12th-clearest and 12th-windiest month. For the whole year in context, see Montemorelos's year-round climate.

Daytime high
31°
5th warmest
Overnight low
21°
9th coldest
Rainfall
167 mm
13.4 wet days
Daylight
12 h 06 min
6:29 AM – 6:38 PM
Cloud cover
52%
12th clearest
Wind
7 km/h
12th windiest
Solar energy
5.34 kWh/m²
Travel score
4.2
out of 10

Montemorelos is municipal seat of Montemorelos, State of Nuevo León, Mexico.

Density
40/km²
people per km²
Founded
1665

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 33°C in the first days to 30°C by the end.

A typical September day in Montemorelos reaches about 31°C in the afternoon and slips back to 21°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, September runs about 4°C cooler than August and about 3°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13322
23322
33322
43222
53222
63222
73222
83222
93222
103221
113121
123121
133121
143121
153121
163121
173121
183121
193121
203121
213020
223020
233020
243020
253020
263020
273020
283020
293019
303019

How September really feels in Montemorelos

Once humidity and wind are folded in, September averages 21 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
21
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.

Montemorelos 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
Jan21° / 305.310.67.3
Feb24° / 11°325.811.17.7
Mar27° / 14°486.511.87.2
Apr30° / 18°657.612.65.5
May32° / 21°768.813.24.1
Jun34° / 22°677.613.53.3
Jul35° / 22°656.413.42.9
Aug35° / 23°587.712.92.8
Sep31° / 21°16713.412.24.2
Oct28° / 17°777.911.46.5
Nov24° / 13°335.410.87.9
Dec21° / 10°244.210.57.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35743
45743
55545
65545
75545
85446
95446
105446
115446
125446
135446
145446
155545
165545
175644
185644
195743
205842
215941
226040
236139
246238
256436
266535
276733
286733
296733
306832

Chance of precipitation in September

Any precipitation

Montemorelos gets around 167 mm of rain over 13.4 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 43% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
144
245
346
447
548
649
750
850
950
1050
1149
1248
1347
1446
1546
1645
1744
1843
1942
2041
2140
2239
2337
2436
2535
2634
2734
2833
2933
3032

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 79% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111155231
211155132
311145133
411144934
512134935
612124837
712124837
812114738
912114739
1012104739
1112104739
1212104739
1313104739
1413114738
1513114837
1614114836
1714124835
1815134834
1915144733
2016154732
2117164630
2227174529
2328184527
2439194426
2539194424
26310204423
27411214322
28411214320
29412214319
30512224318

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 7 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
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:23 AM to 6:35 AM, and sunset from 6:55 PM to 6:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:236:55
212.56:246:53
312.56:246:52
412.46:256:51
512.46:256:50
612.46:256:49
712.46:266:48
812.36:266:47
912.36:276:46
1012.36:276:45
1112.36:276:44
1212.26:286:43
1312.26:286:41
1412.26:296:40
1512.26:296:39
1612.16:296:38
1712.16:306:37
1812.16:306:36
1912.16:306:35
2012.06:316:33
2112.06:316:32
2212.06:326:31
2312.06:326:30
2411.96:326:29
2511.96:336:28
2611.96:336:27
2711.96:346:26
2811.86:346:25
2911.86:346:23
3011.86:356:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.34 kWh/m².

For context, solar energy here swings from a low near 3.57 kWh/m² to a high of 6.79 kWh/m² in July across the year — September's 5.34 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
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 Montemorelos?

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

4.2
Sightseeing
8th-best month of the year
6.3
Beach & pool
7th-best month of the year

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

What to pack for Montemorelos in September

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

In September, Montemorelos sees daytime highs around 31°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Montemorelos 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 Montemorelos 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 Montemorelos 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 Montemorelos 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 Montemorelos?

Montemorelos sits at 25.2°N, 99.8°W, 422 m above sea level, in Mexico. The nearest listed city is Ciudad de Allende, 22 km away.

Topography around Montemorelos

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

Within 3 km, the terrain around Montemorelos has only modest variations in elevation — a maximum elevation change of 130 m around an average of 419 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 593 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,583 m.

The land around Montemorelos is covered by trees (42%) and artificial surfaces (30%) within 3 km, trees (59%) and shrubs (21%) within 16 km, and shrubs (44%) and trees (40%) within 80 km.

3 km
130 m
16 km
593 m
80 km
3,583 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ciudad de Allende 22 km · Santiago 42 km · Linares 45 km · Cadereyta 46 km · Cadereyta Jiménez 48 km · Ciudad Benito Juárez 57 km · Jardines de la Silla 61 km · Guadalupe 69 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 Montemorelos (25.189°, -99.8293°, elevation 422 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).