Xonacatlán weather in September

In September, Xonacatlán sees average daytime highs of 20°C and overnight lows near 10°C, with 214 mm of rain across 21.8 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 8% 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 Xonacatlán's 12th-clearest and 9th-windiest month. For the whole year in context, see Xonacatlán's year-round climate.

Daytime high
20°
8th warmest
Overnight low
10°
11th coldest
Rainfall
214 mm
21.8 wet days
Daylight
12 h 06 min
6:29 AM – 6:36 PM
Cloud cover
78%
12th clearest
Wind
6 km/h
9th windiest
Solar energy
5.04 kWh/m²
Travel score
4.4
out of 10

Xonacatlán is municipal seat of Xonacatlán, State of Mexico, 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 20°C through the month.

A typical September day in Xonacatlán reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°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)
12010
22010
32010
42010
52010
62010
72010
82010
92010
102010
112010
122010
132010
142010
152010
162010
172010
182010
192010
202010
212010
222010
232010
242010
251910
261910
27199
28199
29199
30199

Xonacatlán weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 194117.2
Feb20° / 174.111.37.6
Mar22° / 245.811.97.7
Apr23° / 448.812.47.2
May23° / 9113.812.96.3
Jun22° / 10°2111913.15.0
Jul20° / 10°23825.913.14.0
Aug20° / 10°23024.612.74.1
Sep20° / 10°21421.812.14.4
Oct19° / 9713.511.65.6
Nov19° / 295.511.16.9
Dec19° / 132.510.97.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 79%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11882
21882
31882
41882
51882
61882
71882
81882
91981
101981
111981
122080
132080
142080
152080
162179
172179
182278
192278
202179
212179
222278
232278
242278
252377
262377
272476
282476
292476
302476

Chance of precipitation in September

Any precipitation

Xonacatlán gets around 214 mm of rain over 21.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 71% and peaks near 79% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
179
279
379
479
578
678
777
877
976
1076
1175
1274
1373
1472
1572
1671
1770
1870
1969
2069
2168
2267
2366
2465
2564
2663
2762
2861
2960
3059

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
11000
21000
31000
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
271000
281000
291000
301000

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:26 AM to 6:32 AM, and sunset from 6:49 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:266:49
212.46:266:49
312.46:276:48
412.36:276:47
512.36:276:46
612.36:276:45
712.36:276:44
812.36:286:43
912.26:286:42
1012.26:286:41
1112.26:286:40
1212.26:286:39
1312.26:296:39
1412.16:296:38
1512.16:296:37
1612.16:296:36
1712.16:296:35
1812.16:306:34
1912.16:306:33
2012.06:306:32
2112.06:306:31
2212.06:306:30
2312.06:316:29
2412.06:316:28
2511.96:316:27
2611.96:316:26
2711.96:316:25
2811.96:326:25
2911.96:326:24
3011.86:326:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.04 kWh/m².

For context, solar energy here swings from a low near 4.91 kWh/m² to a high of 7.08 kWh/m² in April across the year — September's 5.04 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Hazard calendar for Xonacatlán

In seasonPeak

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

Xonacatlán's monsoon runs June–September, 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 Xonacatlán?

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

4.4
Sightseeing
10th-best month of the year
2.2
Beach & pool
12th-best month of the year

September is a reasonable time to visit Xonacatlán for sightseeing.

What to pack for Xonacatlán in September

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

In September, Xonacatlán sees daytime highs around 20°C and nights near 10°C. Pack rain gear. Worth having: sun protection. About 22 days see rain.

rain gearsun protection

UV index in Xonacatlán 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 Xonacatlán peaks around March 24 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 highMar 24UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun15Extreme
Jul12Extreme
Aug14Extreme
Sep11Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Xonacatlán 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 Xonacatlán is worst in December — around 79 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 1078 µg/m³Apr 1353 µg/m³
PM2.5 (µg/m³)Level
Jan67Unhealthy
Feb62Unhealthy
Mar55Poor
Apr52Poor
May57Unhealthy
Jun59Unhealthy
Jul69Unhealthy
Aug65Unhealthy
Sep70Unhealthy
Oct66Unhealthy
Nov77Unhealthy
Dec79Unhealthy
Location & terrain

Where is Xonacatlán?

Xonacatlán sits at 19.4°N, 99.5°W, 2,585 m above sea level, in Mexico. The nearest listed city is San José Guadalupe Otzacatipan, 9.0 km away.

Topography around Xonacatlán

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

Within 3 km, the terrain around Xonacatlán has only modest variations in elevation — a maximum elevation change of 128 m around an average of 2,581 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,205 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,666 m.

The land around Xonacatlán is covered by cropland (59%) and artificial surfaces (20%) within 3 km, trees (36%), cropland (27%) and artificial surfaces (20%) within 16 km, and trees (39%) and cropland (23%) within 80 km.

3 km
128 m
16 km
1,205 m
80 km
3,666 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San José Guadalupe Otzacatipan 9.0 km · San Andrés Cuexcontitlán 11 km · San Mateo Otzacatipan 11 km · San Pedro Totoltepec 11 km · Santa María Totoltepec 13 km · Lerma de Villada 13 km · San Pablo Autopan 15 km · San Jerónimo 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 Xonacatlán (19.4051°, -99.5281°, elevation 2,585 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).