Tres Valles weather in September

In September, Tres Valles sees average daytime highs of 32°C and overnight lows near 24°C, with 414 mm of rain across 26.6 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 32°C through the month. The sky is clear or mostly clear about 11% of the time in September, and the air most often feels miserable.

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 Tres Valles's 12th-clearest and 12th-windiest month. For the whole year in context, see Tres Valles's year-round climate.

Daytime high
32°
6th warmest
Overnight low
24°
8th coldest
Rainfall
414 mm
26.6 wet days
Daylight
12 h 06 min
6:16 AM – 6:22 PM
Cloud cover
76%
12th clearest
Wind
4 km/h
12th windiest
Solar energy
4.8 kWh/m²
Travel score
2.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Tres Valles reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°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)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213224
223224
233224
243224
253224
263224
273224
283124
293124
303124

How September really feels in Tres Valles

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
1 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.

Tres Valles 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
Jan27° / 19°407.2117.1
Feb28° / 20°305.411.46.5
Mar31° / 22°28511.95.1
Apr34° / 24°43612.43.4
May35° / 26°11112.912.82.6
Jun33° / 25°34724.213.12.2
Jul33° / 25°36325.9132.4
Aug33° / 25°37527.112.62.3
Sep32° / 24°41426.612.12.4
Oct31° / 23°24818.811.63.7
Nov29° / 21°10411.911.15.5
Dec27° / 20°457.610.96.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 75%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12674
22575
32575
42575
52575
62575
72476
82575
92575
102575
112575
122575
132674
142674
152674
162674
172674
182674
192674
202575
212575
222575
232575
242575
252674
262674
272674
282674
292674
302674

Chance of precipitation in September

Any precipitation

Tres Valles gets around 414 mm of rain over 26.6 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 (%)
192
292
392
492
592
692
792
892
992
1091
1191
1291
1390
1490
1589
1688
1788
1887
1987
2086
2186
2285
2384
2483
2582
2681
2780
2879
2978
3078

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1004357
2004357
3004357
4004357
5004357
6004357
7004357
8004456
9004456
10004456
11004555
12004555
13004555
14004654
15004654
16004654
17004753
18014752
19014851
20014851
21024949
22025048
23035047
24045145
25045244
26055342
27165241
28175240
29185239
30195238

Wind in September

Winds average 4 km/h in September, the calmest month.

Across September, daily wind ranges from about 4 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
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
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
412.36:146:33
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
1212.26:156:26
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
2212.06:176:17
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 4.8 kWh/m².

For context, solar energy here swings from a low near 3.47 kWh/m² to a high of 6.25 kWh/m² in May across the year — September's 4.8 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
264.6Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Tres Valles

In seasonPeak

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

Tres Valles'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 Tres Valles?

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

2.4
Sightseeing
9th-best month of the year
3.9
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Tres Valles.

What to pack for Tres Valles in September

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

In September, Tres Valles sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

UV index in Tres Valles 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 Tres Valles peaks around August 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 16UV 12Dec 17UV 7
UV index (midday)Level
Jan7Very high
Feb10Extreme
Mar10Extreme
Apr12Extreme
May8Very high
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep11Extreme
Oct10Very high
Nov8Very high
Dec7High

Air quality in Tres Valles 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 Tres Valles 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 Tres Valles?

Tres Valles sits at 18.2°N, 96.1°W, 56 m above sea level, in Mexico. The nearest listed city is Tuxtepec, 17 km away.

Topography around Tres Valles

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

Within 3 km, the terrain around Tres Valles has only modest variations in elevation — a maximum elevation change of 43 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 71 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,020 m.

The land around Tres Valles is covered by trees (44%) and grassland (25%) within 3 km, cropland (49%), grassland (24%) and trees (23%) within 16 km, and trees (46%) and grassland (29%) within 80 km.

3 km
43 m
16 km
71 m
80 km
3,020 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Tuxtepec 17 km · Loma Bonita 31 km · Tierra Blanca 33 km · Cosamaloapan 38 km · La Isla 40 km · Carlos A. Carrillo 43 km · Tlacotalpan 65 km · Isla 68 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 Tres Valles (18.2391°, -96.1357°, elevation 56 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).