Heroica Ciudad de Tlaxiaco weather in September

In September, Heroica Ciudad de Tlaxiaco sees average daytime highs of 22°C and overnight lows near 13°C, with 309 mm of rain across 28 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Heroica Ciudad de Tlaxiaco's 12th-clearest and 11th-windiest month. For the whole year in context, see Heroica Ciudad de Tlaxiaco's year-round climate.

Daytime high
22°
10th warmest
Overnight low
13°
10th coldest
Rainfall
309 mm
28 wet days
Daylight
12 h 06 min
6:22 AM – 6:28 PM
Cloud cover
86%
12th clearest
Wind
4 km/h
11th windiest
Solar energy
4.82 kWh/m²
Travel score
3.7
out of 10

Heroica Ciudad de Tlaxiaco is municipal seat of Tlaxiaco, State of Oaxaca, Mexico.

Density
51/km²
people per km²
Founded
~400 BCE

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 22°C through the month.

A typical September day in Heroica Ciudad de Tlaxiaco reaches about 22°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 24°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12213
22213
32213
42213
52213
62213
72213
82213
92213
102213
112213
122213
132213
142213
152213
162213
172213
182213
192213
202213
212213
222213
232213
242213
252212
262212
272212
282212
292212
302212

Heroica Ciudad de Tlaxiaco weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 92.211.18.3
Feb23° / 101.911.48.7
Mar25° / 10°235.611.98.2
Apr25° / 12°449.212.47.2
May24° / 13°14320.712.85.3
Jun23° / 13°30227.4133.9
Jul23° / 12°27127.512.93.9
Aug23° / 12°29528.412.63.8
Sep22° / 13°3092812.13.7
Oct22° / 11°14218.711.65.3
Nov22° / 326.211.27.5
Dec22° / 102.4118.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11090
21090
31090
41090
51090
61090
71090
81090
91090
101090
111090
121090
131090
141090
151090
161090
171090
181090
191090
201189
211189
221189
231189
241189
251189
261486
271486
281486
291585
301684

Chance of precipitation in September

Any precipitation

Heroica Ciudad de Tlaxiaco gets around 309 mm of rain over 28 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 92% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
195
295
395
495
595
695
795
895
995
1095
1195
1295
1394
1494
1594
1694
1794
1893
1993
2093
2192
2291
2391
2490
2588
2687
2786
2885
2984
3083

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
120800
219810
318820
418820
517830
617830
717821
817821
917821
1017821
1117821
1217821
1317821
1417821
1517821
1617821
1717821
1817821
1918811
2018802
2119792
2219792
2320782
2421772
2522771
2623761
2724751
2825741
2926731
3027721

Wind in September

Winds average 4 km/h in September.

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 18 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 24 minutes over September. Sunrise moves from 6:20 AM to 6:24 AM, and sunset from 6:41 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:206:41
212.36:206:40
312.36:206:39
412.36:216:38
512.36:216:37
612.36:216:37
712.26:216:36
812.26:216:35
912.26:216:34
1012.26:216:33
1112.26:226:32
1212.26:226:31
1312.16:226:31
1412.16:226:30
1512.16:226:29
1612.16:226:28
1712.16:226:27
1812.16:226:26
1912.06:236:25
2012.06:236:24
2112.06:236:24
2212.06:236:23
2312.06:236:22
2412.06:236:21
2511.96:236:20
2611.96:246:19
2711.96:246:18
2811.96:246:18
2911.96:246:17
3011.96:246:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.82 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.82 kWh/m² to a high of 6.96 kWh/m² in April across the year — September's 4.82 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Heroica Ciudad de Tlaxiaco

In seasonPeak

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

Heroica Ciudad de Tlaxiaco's monsoon runs May–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 Heroica Ciudad de Tlaxiaco?

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

3.7
Sightseeing
12th-best month of the year
2.7
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Heroica Ciudad de Tlaxiaco.

What to pack for Heroica Ciudad de Tlaxiaco in September

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

In September, Heroica Ciudad de Tlaxiaco sees daytime highs around 22°C and nights near 13°C. Pack rain gear. Worth having: light clothes and sun protection. About 28 days see rain.

rain gearlight clothessun protection

UV index in Heroica Ciudad de Tlaxiaco in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heroica Ciudad de Tlaxiaco peaks around April 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 11UV 15Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr15Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Heroica Ciudad de Tlaxiaco 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 Heroica Ciudad de Tlaxiaco is worst in May — around 24 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1324 µg/m³Jan 219 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar12Moderate
Apr21Moderate
May24Moderate
Jun15Moderate
Jul16Moderate
Aug13Moderate
Sep13Moderate
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Heroica Ciudad de Tlaxiaco?

Heroica Ciudad de Tlaxiaco sits at 17.3°N, 97.7°W, 2,082 m above sea level, in Mexico. The nearest listed city is Ciudad de Huajuapan de León, 61 km away.

Topography around Heroica Ciudad de Tlaxiaco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heroica Ciudad de Tlaxiaco.

Within 3 km, the terrain around Heroica Ciudad de Tlaxiaco has significant variations in elevation — a maximum elevation change of 351 m around an average of 2,116 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,626 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,211 m.

The land around Heroica Ciudad de Tlaxiaco is covered by grassland (39%), trees (28%) and artificial surfaces (22%) within 3 km, trees (65%) and grassland (28%) within 16 km, and trees (62%) and grassland (20%) within 80 km.

3 km
351 m
16 km
1,626 m
80 km
3,211 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Ciudad de Huajuapan de León 61 km · Santa María Atzompa 98 km · Tlapa de Comonfort 100 km · Ometepec 101 km · Santa Cruz Xoxocotlán 104 km · Oaxaca 104 km · San Antonio de la Cal 107 km · Pinotepa Nacional 111 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 Heroica Ciudad de Tlaxiaco (17.2687°, -97.6803°, elevation 2,082 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).