Nuevo Laredo weather in September

In September, Nuevo Laredo sees average daytime highs of 34°C and overnight lows near 24°C, with 77 mm of rain across 8.8 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 36°C in the first days to 33°C by the end. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels oppressive.

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 Nuevo Laredo's 5th-clearest and 11th-windiest month. For the whole year in context, see Nuevo Laredo's year-round climate.

Daytime high
34°
5th warmest
Overnight low
24°
9th coldest
Rainfall
77 mm
8.8 wet days
Daylight
12 h 12 min
6:28 AM – 6:37 PM
Cloud cover
45%
5th clearest
Wind
14 km/h
11th windiest
Solar energy
5.39 kWh/m²
Travel score
3.0
out of 10

Nuevo Laredo is municipal seat of Nuevo Laredo, State of Tamaulipas, Mexico.

Founded
1775

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 36°C in the first days to 33°C by the end.

A typical September day in Nuevo Laredo reaches about 34°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 38°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)
13625
23625
33625
43625
53625
63525
73525
83525
93524
103524
113524
123524
133524
143424
153424
163424
173424
183424
193423
203423
213423
223423
233423
243423
253323
263322
273322
283322
293322
303322

How September really feels in Nuevo Laredo

Once humidity and wind are folded in, September averages 30 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
30
4 feel dangerously hot (≥ 39°C)
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.

Nuevo Laredo 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° / 10°254.410.57.3
Feb24° / 12°224.4117.8
Mar28° / 16°445.311.86.9
Apr32° / 19°435.612.64.7
May35° / 23°637.413.32.9
Jun37° / 25°335.213.71.7
Jul38° / 26°455.313.61.2
Aug38° / 26°355131.2
Sep34° / 24°778.812.23.0
Oct31° / 20°445.311.35.4
Nov25° / 14°294.210.67.9
Dec21° / 10°29510.37.4

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 16% of September, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36535
46535
56436
66436
76436
86436
96436
106436
116436
126436
136436
146535
156634
166634
176634
186634
196832
206832
216931
227129
237129
247228
257426
267426
277525
287624
297723
307723

Chance of precipitation in September

Any precipitation

Nuevo Laredo gets around 77 mm of rain over 8.8 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 28% 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 (%)
130
231
332
433
534
634
734
834
934
1034
1133
1232
1331
1431
1530
1629
1728
1827
1927
2026
2125
2224
2324
2423
2522
2622
2721
2821
2920
3020

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 78% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111738503
212737503
312735532
412734542
522733542
622732552
723731552
823730562
923730562
1023730562
1133730552
1234829542
1334829542
1434829542
1535929522
16451029503
17461029493
18461129473
19571229453
20581328443
21681328422
22791427402
237101527392
248101626372
259111626362
269121726352
2710121726332
2810131726322
2911131726312
3012141725311

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 6:21 AM to 6:34 AM, and sunset from 6:55 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:216:55
212.56:216:54
312.56:226:53
412.56:226:52
512.56:226:50
612.46:236:49
712.46:236:48
812.46:246:47
912.46:246:46
1012.36:256:44
1112.36:256:43
1212.36:266:42
1312.26:266:41
1412.26:276:40
1512.26:276:38
1612.26:286:37
1712.16:286:36
1812.16:286:35
1912.16:296:34
2012.06:296:32
2112.06:306:31
2212.06:306:30
2312.06:316:29
2411.96:316:28
2511.96:326:26
2611.96:326:25
2711.96:336:24
2811.86:336:23
2911.86:346:22
3011.86:346:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.39 kWh/m².

For context, solar energy here swings from a low near 3.01 kWh/m² to a high of 6.97 kWh/m² in July across the year — September's 5.39 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.5Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Nuevo Laredo?

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

3.0
Sightseeing
8th-best month of the year
6.1
Beach & pool
6th-best month of the year

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

What to pack for Nuevo Laredo in September

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

In September, Nuevo Laredo sees daytime highs around 34°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Nuevo Laredo 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 Nuevo Laredo peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 13UV 11Dec 19UV 4
UV index (midday)Level
Jan5Moderate
Feb7High
Mar8Very high
Apr10Very high
May10Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct7Very high
Nov5High
Dec4Moderate

Air quality in Nuevo Laredo 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 Nuevo Laredo is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (January, 5 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Jan 165 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb5Good
Mar7Good
Apr9Good
May16Moderate
Jun15Moderate
Jul18Moderate
Aug13Moderate
Sep9Good
Oct6Good
Nov5Good
Dec5Good
Location & terrain

Where is Nuevo Laredo?

Nuevo Laredo sits at 27.5°N, 99.5°W, 130 m above sea level, in Mexico. The nearest listed city is Laredo, 3.0 km away.

Topography around Nuevo Laredo

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

Within 3 km, the terrain around Nuevo Laredo has only modest variations in elevation — a maximum elevation change of 53 m around an average of 130 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 102 m; within 80 km, only modest variations in elevation — a maximum elevation change of 203 m.

The land around Nuevo Laredo is covered by artificial surfaces (82%) within 3 km, shrubs (59%) and artificial surfaces (21%) within 16 km, and shrubs (85%) within 80 km.

3 km
53 m
16 km
102 m
80 km
203 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Laredo 3.0 km · Anáhuac 66 km · Ciudad Sabinas Hidalgo 127 km · Ciudad Miguel Alemán 129 km · Alice 146 km · Nava 162 km · Allende 163 km · Sabinas 163 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 Nuevo Laredo (27.4763°, -99.5164°, elevation 130 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).