Zacatlán weather in September

In September, Zacatlán sees average daytime highs of 21°C and overnight lows near 13°C, with 319 mm of rain across 26.7 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 21°C through the month. The sky is clear or mostly clear about 4% of the time in September, and the air most often feels comfortable.

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

Daytime high
21°
6th warmest
Overnight low
13°
11th coldest
Rainfall
319 mm
26.7 wet days
Daylight
12 h 06 min
6:23 AM – 6:30 PM
Cloud cover
82%
12th clearest
Wind
5 km/h
12th windiest
Solar energy
4.74 kWh/m²
Travel score
3.8
out of 10

Zacatlán is municipal seat of Zacatlán, State of Puebla, Mexico.

Founded
1562

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 Zacatlán reaches about 21°C in the afternoon and slips back to 13°C overnight — a 8°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 about 1°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12113
22113
32113
42113
52113
62113
72113
82113
92113
102113
112113
122113
132113
142113
152113
162113
172113
182113
192113
202113
212113
222113
232113
242013
252013
262013
272013
282012
292012
302012

Zacatlán 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
Jan17° / 6412.510.95.1
Feb19° / 641211.35.6
Mar20° / 9716.511.95.5
Apr22° / 11°13519.412.45.2
May23° / 12°13920.812.95.2
Jun22° / 13°27924.213.24.3
Jul21° / 13°26929.513.13.6
Aug21° / 13°27528.912.73.6
Sep21° / 13°31926.712.13.8
Oct20° / 11°24820.711.54.6
Nov18° / 11815.311.15.1
Dec17° / 6012.410.85.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 85%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11288
21288
31387
41387
51387
61387
71288
81288
91288
101387
111387
121387
131486
141585
151585
161585
171585
181486
191486
201486
211486
221585
231684
241684
251684
261783
271783
281783
291981
301981

Chance of precipitation in September

Any precipitation

Zacatlán gets around 319 mm of rain over 26.7 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 88% and peaks near 93% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
193
293
393
493
593
693
793
893
993
1092
1192
1292
1392
1491
1591
1690
1789
1889
1988
2087
2186
2285
2384
2483
2582
2681
2780
2879
2978
3078

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 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
17867
27867
37867
47867
57867
67858
78848
88839
98839
1088210
1188210
1298110
1398011
1498011
15107911
16107911
17117811
18127711
19127810
20137710
21157510
2216759
2318739
2420728
2521718
2623707
2724697
2826686
2927676
3028675

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 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
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 6:20 AM to 6:26 AM, and sunset from 6:44 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:206:44
212.46:206:43
312.46:206:42
412.36:206:41
512.36:206:40
612.36:216:39
712.36:216:38
812.36:216:37
912.26:216:36
1012.26:226:35
1112.26:226:34
1212.26:226:33
1312.26:226:32
1412.26:226:31
1512.16:236:30
1612.16:236:30
1712.16:236:29
1812.16:236:28
1912.16:236:27
2012.06:246:26
2112.06:246:25
2212.06:246:24
2312.06:246:23
2412.06:256:22
2511.96:256:21
2611.96:256:20
2711.96:256:19
2811.96:256:18
2911.96:266:17
3011.86:266:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.74 kWh/m².

For context, solar energy here swings from a low near 3.95 kWh/m² to a high of 6.34 kWh/m² in May across the year — September's 4.74 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Zacatlán

In seasonPeak

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

Zacatlán'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 Zacatlán?

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

3.8
Sightseeing
10th-best month of the year
2.2
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Zacatlán.

What to pack for Zacatlán in September

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

In September, Zacatlán sees daytime highs around 21°C and nights near 13°C. Pack rain gear. Worth having: sun protection. About 27 days see rain.

rain gearsun protection

UV index in Zacatlán 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 Zacatlán peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 highApr 12UV 14Dec 17UV 8
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr14Extreme
May10Very high
Jun14Extreme
Jul12Extreme
Aug14Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Zacatlán 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 Zacatlán is worst in December — around 95 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (September, 49 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyDec 2194 µg/m³Sep 1649 µg/m³
PM2.5 (µg/m³)Level
Jan88Unhealthy
Feb89Unhealthy
Mar85Unhealthy
Apr90Unhealthy
May85Unhealthy
Jun59Unhealthy
Jul56Unhealthy
Aug52Poor
Sep49Poor
Oct52Poor
Nov70Unhealthy
Dec95Unhealthy
Location & terrain

Where is Zacatlán?

Zacatlán sits at 19.9°N, 98.0°W, 2,048 m above sea level, in Mexico. The nearest listed city is Chignahuapan, 13 km away.

Topography around Zacatlán

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

Within 3 km, the terrain around Zacatlán has large variations in elevation — a maximum elevation change of 769 m around an average of 2,049 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,999 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,363 m.

The land around Zacatlán is covered by trees (48%) and cropland (20%) within 3 km, trees (67%) within 16 km, and trees (50%) and cropland (23%) within 80 km.

3 km
769 m
16 km
1,999 m
80 km
4,363 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Chignahuapan 13 km · Huauchinango 28 km · Xicotepec de Juárez 38 km · Cuautepec de Hinojosa 38 km · Santiago Tulantepec 43 km · Tulancingo 45 km · Zaragoza 46 km · Tetla 57 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 Zacatlán (19.9355°, -97.9613°, elevation 2,048 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).