San Salvador El Seco weather in September

In September, San Salvador El Seco sees average daytime highs of 21°C and overnight lows near 11°C, with 142 mm of rain across 16.4 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 2nd-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 San Salvador El Seco's 12th-clearest and 8th-windiest month. For the whole year in context, see San Salvador El Seco's year-round climate.

Daytime high
21°
7th warmest
Overnight low
11°
11th coldest
Rainfall
142 mm
16.4 wet days
Daylight
12 h 06 min
6:22 AM – 6:28 PM
Cloud cover
76%
12th clearest
Wind
7 km/h
8th windiest
Solar energy
5.31 kWh/m²
Travel score
5.3
out of 10

San Salvador El Seco is municipal seat of San Salvador el Seco, State of Puebla, 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 San Salvador El Seco 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 19°C and 24°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12211
22211
32211
42211
52211
62211
72211
82211
92211
102111
112111
122111
132111
142111
152111
162111
172111
182111
192111
202111
212111
222111
232111
242111
252111
262111
272111
282111
292111
302111

San Salvador El Seco weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 153.1117.6
Feb21° / 153.111.48.0
Mar23° / 397.811.97.6
Apr24° / 721212.46.8
May23° / 11°11316.712.96.0
Jun23° / 11°15716.713.15.6
Jul22° / 10°10613.9136.0
Aug23° / 11°11814.812.65.9
Sep21° / 11°14216.412.15.3
Oct21° / 10°7610.611.66.4
Nov21° / 285.311.17.3
Dec20° / 112.410.97.8

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 76%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12575
22476
32476
42476
52476
62377
72377
82377
92377
102377
112377
122377
132476
142476
152476
162476
172476
182476
192476
202575
212575
222575
232575
242575
252674
262872
272872
282872
292872
302872

Chance of precipitation in September

Any precipitation

San Salvador El Seco gets around 142 mm of rain over 16.4 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 54% and peaks near 58% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
155
256
356
457
557
657
758
858
958
1058
1157
1257
1357
1456
1555
1655
1754
1854
1953
2052
2152
2251
2350
2449
2549
2648
2747
2847
2947
3046

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
19010
28911
38911
48911
58812
68812
78812
88812
98713
108713
118713
128713
138713
148812
158812
168812
178812
188812
198911
208911
218911
229010
239010
24919
25919
26919
27928
28928
29928
30928

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 8 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
268calm
278calm
288calm
298calm
308calm

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 6:19 AM to 6:24 AM, and sunset from 6:42 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:196:42
212.46:196:41
312.36:196:40
412.36:196:39
512.36:206:38
612.36:206:37
712.36:206:36
812.36:206:35
912.26:206:35
1012.26:216:34
1112.26:216:33
1212.26:216:32
1312.26:216:31
1412.16:216:30
1512.16:216:29
1612.16:226:28
1712.16:226:27
1812.16:226:26
1912.16:226:25
2012.06:226:24
2112.06:236:23
2212.06:236:23
2312.06:236:22
2412.06:236:21
2511.96:236:20
2611.96:246:19
2711.96:246:18
2811.96:246:17
2911.96:246:16
3011.86:246:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.31 kWh/m².

For context, solar energy here swings from a low near 4.92 kWh/m² to a high of 6.91 kWh/m² in April across the year — September's 5.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.6Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for San Salvador El Seco

In seasonPeak

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

San Salvador El Seco's rainy season runs April–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 San Salvador El Seco?

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

5.3
Sightseeing
12th-best month of the year
3.5
Beach & pool
12th-best month of the year

September is a reasonable time to visit San Salvador El Seco for sightseeing.

What to pack for San Salvador El Seco in September

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

In September, San Salvador El Seco sees daytime highs around 21°C and nights near 11°C. Pack rain gear. Worth having: sun protection. About 16 days see rain.

rain gearsun protection

UV index in San Salvador El Seco 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 San Salvador El Seco peaks around April 11 at about 15 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 11UV 15Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar14Extreme
Apr15Extreme
May10Extreme
Jun14Extreme
Jul13Extreme
Aug14Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec8Very high

Air quality in San Salvador El Seco 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 San Salvador El Seco is worst in May — around 69 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (October, 38 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorUnhealthyMay 1268 µg/m³Oct 1138 µg/m³
PM2.5 (µg/m³)Level
Jan53Poor
Feb54Poor
Mar56Unhealthy
Apr63Unhealthy
May69Unhealthy
Jun48Poor
Jul41Poor
Aug38Poor
Sep39Poor
Oct38Poor
Nov49Poor
Dec59Unhealthy
Location & terrain

Where is San Salvador El Seco?

San Salvador El Seco sits at 19.1°N, 97.6°W, 2,437 m above sea level, in Mexico. The nearest listed city is Acatzingo, 22 km away.

Topography around San Salvador El Seco

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Salvador El Seco.

Within 3 km, the terrain around San Salvador El Seco has only modest variations in elevation — a maximum elevation change of 244 m around an average of 2,387 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 750 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,927 m.

The land around San Salvador El Seco is covered by cropland (48%) and shrubs (22%) within 3 km, cropland (42%) and grassland (24%) within 16 km, and trees (32%), cropland (24%) and shrubs (20%) within 80 km.

3 km
244 m
16 km
750 m
80 km
4,927 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Acatzingo 22 km · Palmarito Tochapan 26 km · Ciudad Serdán 26 km · Los Reyes de Juárez 27 km · Tecamachalco 29 km · Acajete 33 km · Tepeaca 33 km · Tepatlaxco de Hidalgo 35 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 San Salvador El Seco (19.1333°, -97.6417°, elevation 2,437 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).