Teotihuacán de Arista weather in September

In September, Teotihuacán de Arista sees average daytime highs of 21°C and overnight lows near 11°C, with 137 mm of rain across 19.1 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 10% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Teotihuacán de Arista's 12th-clearest and 8th-windiest month. For the whole year in context, see Teotihuacán de Arista's year-round climate.

Daytime high
21°
8th warmest
Overnight low
11°
11th coldest
Rainfall
137 mm
19.1 wet days
Daylight
12 h 06 min
6:26 AM – 6:33 PM
Cloud cover
74%
12th clearest
Wind
7 km/h
8th windiest
Solar energy
5.15 kWh/m²
Travel score
5.0
out of 10

Teotihuacán de Arista is municipal seat of Teotihuacán, State of México, Mexico.

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 21°C through the month.

A typical September day in Teotihuacán de Arista reaches about 21°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°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)
12111
22111
32111
42111
52111
62111
72111
82111
92111
102111
112111
122111
132111
142111
152111
162111
172111
182111
192111
202111
212111
222111
232111
242111
252111
262111
272111
282111
292111
302111

Teotihuacán de Arista weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 122.810.97.7
Feb22° / 112.611.38.2
Mar24° / 174.911.98.2
Apr25° / 10°367.612.47.5
May24° / 11°5811.912.96.8
Jun23° / 12°13016.413.25.7
Jul22° / 11°13419.613.15.1
Aug22° / 11°13420.112.75.0
Sep21° / 11°13719.112.15.0
Oct21° / 6410.811.56.3
Nov20° / 224.411.17.5
Dec20° / 71.410.87.9

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 15% of September, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22476
32476
42476
52575
62575
72575
82476
92476
102575
112575
122575
132575
142575
152575
162575
172575
182575
192674
202674
212674
222575
232674
242773
252773
262872
272971
282971
292971
303169

Chance of precipitation in September

Any precipitation

Teotihuacán de Arista gets around 137 mm of rain over 19.1 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 62% and peaks near 67% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
166
267
367
467
567
667
767
866
966
1066
1165
1265
1364
1464
1563
1663
1762
1862
1962
2061
2161
2260
2359
2458
2557
2656
2755
2853
2952
3051

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1955
2955
3955
4955
5955
6955
7955
8946
9946
10946
11946
12946
13946
14946
15946
16946
17946
18946
19946
20946
21937
22937
23937
24946
25946
26946
27946
28946
29955
30955

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 36 minutes over September. Sunrise moves from 6:23 AM to 6:30 AM, and sunset from 6:47 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:236:47
212.46:246:46
312.46:246:45
412.36:246:44
512.36:246:43
612.36:246:42
712.36:256:42
812.36:256:41
912.26:256:40
1012.26:256:39
1112.26:256:38
1212.26:266:37
1312.26:266:36
1412.16:266:35
1512.16:266:34
1612.16:266:33
1712.16:276:32
1812.16:276:31
1912.16:276:30
2012.06:276:29
2112.06:276:28
2212.06:286:27
2312.06:286:26
2412.06:286:26
2511.96:286:25
2611.96:296:24
2711.96:296:23
2811.96:296:22
2911.96:296:21
3011.86:306:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.15 kWh/m².

For context, solar energy here swings from a low near 5.01 kWh/m² to a high of 7.13 kWh/m² in April across the year — September's 5.15 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Teotihuacán de Arista

In seasonPeak

In September, Teotihuacán de Arista sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Teotihuacán de Arista's rainy season runs June–October, when most of the year's rain falls.

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

Is September a good time to visit Teotihuacán de Arista?

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

5.0
Sightseeing
11th-best month of the year
3.0
Beach & pool
12th-best month of the year

September is a reasonable time to visit Teotihuacán de Arista for sightseeing.

What to pack for Teotihuacán de Arista in September

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

In September, Teotihuacán de Arista sees daytime highs around 21°C and nights near 11°C. Pack rain gear. Worth having: sun protection. About 19 days see rain.

rain gearsun protection

UV index in Teotihuacán de Arista 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 Teotihuacán de Arista peaks around June 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 17UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May11Extreme
Jun15Extreme
Jul12Extreme
Aug14Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Teotihuacán de Arista 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 Teotihuacán de Arista is worst in December — around 179 µg/m³ PM2.5 (very unhealthy), and holds fairly steady the rest of the year.

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyDec 11178 µg/m³Apr 14115 µg/m³
PM2.5 (µg/m³)Level
Jan149Unhealthy
Feb141Unhealthy
Mar126Unhealthy
Apr113Unhealthy
May134Unhealthy
Jun126Unhealthy
Jul135Unhealthy
Aug127Unhealthy
Sep136Unhealthy
Oct137Unhealthy
Nov174Very unhealthy
Dec179Very unhealthy
Location & terrain

Where is Teotihuacán de Arista?

Teotihuacán de Arista sits at 19.7°N, 98.9°W, 2,284 m above sea level, in Mexico. The nearest listed city is Teotihuacan, 0.0 km away.

Topography around Teotihuacán de Arista

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

Within 3 km, the terrain around Teotihuacán de Arista has significant variations in elevation — a maximum elevation change of 327 m around an average of 2,304 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 823 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,037 m.

The land around Teotihuacán de Arista is covered by artificial surfaces (32%), shrubs (28%) and cropland (24%) within 3 km, shrubs (35%) and cropland (31%) within 16 km, and trees (29%) and cropland (29%) within 80 km.

3 km
327 m
16 km
823 m
80 km
4,037 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Teotihuacan 0.0 km · Tecámac de Felipe Villanueva 12 km · Tepexpan 12 km · Tecámac 12 km · San Martín Azcatepec 12 km · Tezoyuca 12 km · Santa María Ajoloapan 13 km · Chiconcuac 15 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 Teotihuacán de Arista (19.6897°, -98.8608°, elevation 2,284 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).