Tuxtepec weather in September

In September, Tuxtepec sees average daytime highs of 30°C and overnight lows near 23°C, with 423 mm of rain across 26.5 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 10% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Tuxtepec's 12th-clearest and 12th-windiest month. For the whole year in context, see Tuxtepec's year-round climate.

Daytime high
30°
6th warmest
Overnight low
23°
10th coldest
Rainfall
423 mm
26.5 wet days
Daylight
12 h 06 min
6:16 AM – 6:22 PM
Cloud cover
77%
12th clearest
Wind
3 km/h
12th windiest
Solar energy
4.78 kWh/m²
Travel score
2.9
out of 10

Tuxtepec is municipal seat of Tuxtepec, State of Oaxaca, Mexico.

Density
17,717/km²
people per km²
Founded
~14 CE

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Tuxtepec reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 32°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13123
23123
33123
43023
53023
63023
73023
83023
93023
103023
113023
123023
133023
143023
153023
163023
173023
183023
193023
203023
213023
223023
233023
243023
253023
263023
273023
283023
293023
303023

How September really feels in Tuxtepec

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
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.

Tuxtepec weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 18°8511.4116.7
Feb26° / 18°638.811.46.7
Mar29° / 20°608.911.95.8
Apr32° / 22°68912.44.3
May32° / 24°11714.112.83.5
Jun31° / 24°33424.413.12.8
Jul31° / 23°32125.4133.0
Aug31° / 23°34126.512.62.9
Sep30° / 23°42326.512.12.9
Oct29° / 22°29019.711.64.2
Nov27° / 20°15913.611.16.0
Dec25° / 18°8711.110.96.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22575
32575
42476
52377
62377
72278
82278
92278
102278
112377
122377
132377
142377
152377
162377
172377
182377
192278
202278
212278
222278
232377
242377
252377
262476
272476
282476
292476
302674

Chance of precipitation in September

Any precipitation

Tuxtepec gets around 423 mm of rain over 26.5 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 87% and peaks near 92% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
191
291
392
492
592
692
792
892
992
1092
1191
1291
1390
1489
1589
1688
1787
1887
1986
2086
2185
2284
2383
2482
2581
2680
2780
2879
2978
3078

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 85% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
102926
203916
303916
403916
503907
603907
704888
804888
904879
1004879
11048610
12048610
13048610
14048511
15048511
16048511
17048511
18048511
19058411
20058510
21168310
2217839
2318829
2419828
25210808
26211807
27312787
28313777
29314776
30315766

Wind in September

Winds average 3 km/h in September, the calmest month.

Across September, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over September. Sunrise moves from 6:13 AM to 6:18 AM, and sunset from 6:35 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:136:35
212.36:146:34
312.36:146:33
412.36:146:32
512.36:146:32
612.36:146:31
712.36:146:30
812.26:156:29
912.26:156:28
1012.26:156:27
1112.26:156:26
1212.26:156:25
1312.26:156:25
1412.16:156:24
1512.16:166:23
1612.16:166:22
1712.16:166:21
1812.16:166:20
1912.06:166:19
2012.06:166:18
2112.06:176:17
2212.06:176:16
2312.06:176:16
2412.06:176:15
2511.96:176:14
2611.96:176:13
2711.96:186:12
2811.96:186:11
2911.96:186:10
3011.96:186:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.78 kWh/m².

For context, solar energy here swings from a low near 3.53 kWh/m² to a high of 6.3 kWh/m² in May across the year — September's 4.78 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.4Bright
Planning a trip in September

Hazard calendar for Tuxtepec

In seasonPeak

In September, Tuxtepec sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Tuxtepec's monsoon runs June–October, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Tuxtepec?

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

2.9
Sightseeing
10th-best month of the year
4.1
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Tuxtepec.

What to pack for Tuxtepec in September

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

In September, Tuxtepec sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Tuxtepec in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tuxtepec peaks around August 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highAug 17UV 12Dec 18UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar10Extreme
Apr12Extreme
May8Very high
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Tuxtepec 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 Tuxtepec is worst in May — around 49 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (January, 13 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMay 1647 µg/m³Jan 1513 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar20Moderate
Apr31Moderate
May49Poor
Jun28Moderate
Jul31Moderate
Aug24Moderate
Sep21Moderate
Oct15Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Tuxtepec?

Tuxtepec sits at 18.1°N, 96.1°W, 31 m above sea level, in Mexico. The nearest listed city is Tres Valles, 17 km away.

Topography around Tuxtepec

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

Within 3 km, the terrain around Tuxtepec has only modest variations in elevation — a maximum elevation change of 53 m around an average of 23 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 484 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,207 m.

The land around Tuxtepec is covered by trees (45%) and artificial surfaces (31%) within 3 km, trees (45%), grassland (28%) and cropland (22%) within 16 km, and trees (50%) and grassland (28%) within 80 km.

3 km
53 m
16 km
484 m
80 km
3,207 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Tres Valles 17 km · Loma Bonita 26 km · Cosamaloapan 46 km · Tierra Blanca 47 km · Carlos A. Carrillo 50 km · La Isla 57 km · Isla 63 km · Tlacotalpan 76 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 Tuxtepec (18.0883°, -96.1253°, elevation 31 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).