Laredo weather in September

In September, Laredo sees average daytime highs of 94°F and overnight lows near 74°F, with 3.0 in 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 97°F in the first days to 92°F 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 Laredo's 5th-clearest and 11th-windiest month. For the whole year in context, see Laredo's year-round climate.

Daytime high
94°
5th warmest
Overnight low
74°
9th coldest
Rainfall
3.0 in
8.8 wet days
Daylight
12 h 12 min
6:28 AM – 6:37 PM
Cloud cover
45%
5th clearest
Wind
8 mph
11th windiest
Solar energy
5.39 kWh/m²
Travel score
3.0
out of 10

Laredo is city in and county seat of Webb County, Texas, United States.

Density
964/km²
people per km²
Founded
1755

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 97°F in the first days to 92°F by the end.

A typical September day in Laredo reaches about 94°F in the afternoon and slips back to 74°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 86°F and 101°F. Set against its neighbours, September runs about 6°F cooler than August and about 7°F warmer than October.

60°70°80°90°100°151015202530
Avg high (°F)Avg low (°F)
19777
29777
39777
49677
59677
69676
79576
89576
99576
109576
119476
129476
139475
149475
159475
169475
179374
189374
199374
209374
219374
229373
239273
249273
259273
269272
279272
289272
299171
309171

How September really feels in Laredo

Once humidity and wind are folded in, September averages 30 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
30
4 feel dangerously hot (≥ 102°F)
Days feeling ≤ 32°F
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.

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 (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan69° / 50°1.04.410.57.3
Feb75° / 54°0.94.4117.8
Mar82° / 60°1.75.311.86.9
Apr89° / 67°1.75.612.64.7
May94° / 73°2.57.413.32.9
Jun99° / 77°1.35.213.71.7
Jul100° / 78°1.85.313.61.2
Aug100° / 78°1.45131.2
Sep94° / 74°3.08.812.23.0
Oct87° / 67°1.75.311.35.4
Nov78° / 58°1.24.210.67.9
Dec70° / 51°1.1510.37.4

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

Laredo gets around 3.0 in 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 8 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light 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
312.56:216:53
412.56:226:51
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 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 Laredo. The water and warmth also suit a beach or pool day.

What to pack for Laredo in September

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

In September, Laredo sees daytime highs around 94°F and nights near 74°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in 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 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 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 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 Laredo?

Laredo sits at 27.5°N, 99.5°W, 413 ft above sea level, in United States. The nearest listed city is Nuevo Laredo, 1.9 mi away.

Topography around Laredo

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Laredo.

Within 2 miles, the terrain around Laredo has only modest variations in elevation — a maximum elevation change of 184 ft around an average of 420 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 351 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 666 ft.

The land around Laredo is covered by artificial surfaces (73%) within 2 miles, shrubs (58%) and artificial surfaces (22%) within 10 miles, and shrubs (84%) within 50 miles.

2 miles
184 ft
10 miles
351 ft
50 miles
666 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nuevo Laredo 1.9 mi · Anáhuac 42 mi · Ciudad Sabinas Hidalgo 81 mi · Ciudad Miguel Alemán 82 mi · Alice 89 mi · Nava 99 mi · Allende 100 mi · Kingsville 101 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Laredo (27.5064°, -99.5075°, elevation 413 ft), 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).