Saltillo weather in September

In September, Saltillo sees average daytime highs of 25°C and overnight lows near 15°C, with 103 mm of rain across 14.6 wet days and about 12.2 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 41% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 30 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Saltillo's 11th-clearest and 10th-windiest month. For the whole year in context, see Saltillo's year-round climate.

Daytime high
25°
6th warmest
Overnight low
15°
8th coldest
Rainfall
103 mm
14.6 wet days
Daylight
12 h 06 min
6:34 AM – 6:43 PM
Cloud cover
52%
11th clearest
Wind
7 km/h
10th windiest
Solar energy
5.53 kWh/m²
Travel score
6.3
out of 10

Saltillo is capital city of the State of Coahuila, Mexico.

Air quality
Elevated
PM2.5 21 µg/m³ · 2018
Founded
1577

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 25°C through the month.

A typical September day in Saltillo reaches about 25°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, September runs about 2°C cooler than August and about 1°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12616
22616
32516
42516
52516
62516
72516
82516
92516
102516
112516
122516
132516
142516
152515
162515
172515
182415
192415
202415
212415
222415
232415
242415
252414
262414
272414
282414
292414
302414

Saltillo weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 213.610.67.0
Feb20° / 183.311.17.7
Mar23° / 10°264.711.88.1
Apr26° / 13°265.912.67.6
May28° / 16°3910.113.26.4
Jun28° / 17°611113.66.0
Jul27° / 17°1031713.45.6
Aug27° / 16°8615.812.95.8
Sep25° / 15°10314.612.26.3
Oct23° / 13°396.911.47.8
Nov21° / 203.410.87.9
Dec19° / 18310.47.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25545
35545
45545
55446
65446
75347
85446
95347
105446
115446
125446
135446
145545
155545
165644
175644
185743
195743
205842
215941
226040
236238
246436
256634
266733
276931
286931
297129
307228

Chance of precipitation in September

Any precipitation

Saltillo gets around 103 mm of rain over 14.6 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 48% and peaks near 54% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
153
253
353
454
554
654
754
854
954
1054
1154
1254
1354
1453
1552
1652
1751
1850
1949
2047
2146
2244
2342
2440
2538
2636
2735
2833
2932
3031

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 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11352350
21450360
31449370
41448370
51448380
61447380
71447381
81447381
91447381
101447381
111447381
121447381
131548371
141548361
151648361
161648351
171748341
181948330
192047320
202246310
212445300
222744290
232943270
243143260
253342240
263542230
273741210
283941200
294041190
304241180

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
18calm
28calm
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 30 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 42 minutes over September. Sunrise moves from 6:28 AM to 6:40 AM, and sunset from 6:59 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:286:59
212.56:286:58
312.56:296:57
412.46:296:56
512.46:306:55
612.46:306:54
712.46:306:53
812.36:316:52
912.36:316:51
1012.36:316:49
1112.36:326:48
1212.26:326:47
1312.26:336:46
1412.26:336:45
1512.26:336:44
1612.16:346:43
1712.16:346:42
1812.16:356:40
1912.16:356:39
2012.06:356:38
2112.06:366:37
2212.06:366:36
2312.06:376:35
2411.96:376:34
2511.96:376:32
2611.96:386:31
2711.96:386:30
2811.86:396:29
2911.86:396:28
3011.86:406:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.53 kWh/m².

For context, solar energy here swings from a low near 4.02 kWh/m² to a high of 7.28 kWh/m² in May across the year — September's 5.53 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Saltillo

In seasonPeak

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

Saltillo's rainy season runs June–September, 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 Saltillo?

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

6.3
Sightseeing
9th-best month of the year
5.6
Beach & pool
8th-best month of the year

September is a reasonable time to visit Saltillo for sightseeing.

What to pack for Saltillo in September

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

In September, Saltillo sees daytime highs around 25°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 15 days see rain.

rain gearlight clothessun protection

UV index in Saltillo 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 Saltillo peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 20UV 12Dec 19UV 5
UV index (midday)Level
Jan6High
Feb9Very high
Mar10Very high
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct9Very high
Nov6High
Dec5High

Air quality in Saltillo 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 Saltillo is worst in July — around 26 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (February, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Saltillo's WHO annual average of 21 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1726 µg/m³Feb 1116 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb16Moderate
Mar18Moderate
Apr19Moderate
May26Moderate
Jun24Moderate
Jul26Moderate
Aug24Moderate
Sep24Moderate
Oct20Moderate
Nov20Moderate
Dec18Moderate
Location & terrain

Where is Saltillo?

Saltillo sits at 25.4°N, 101.0°W, 1,578 m above sea level, in Mexico. The nearest listed city is Ramos Arizpe, 13 km away.

Topography around Saltillo

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

Within 3 km, the terrain around Saltillo has only modest variations in elevation — a maximum elevation change of 203 m around an average of 1,587 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,782 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,242 m.

The land around Saltillo is covered by artificial surfaces (86%) within 3 km, shrubs (56%) and artificial surfaces (20%) within 16 km, and shrubs (69%) within 80 km.

3 km
203 m
16 km
1,782 m
80 km
3,242 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Ramos Arizpe 13 km · García 57 km · Santa Catarina 59 km · San Pedro Garza García 63 km · Parque Industrial Ciudad Mitras 67 km · Mitras Poniente 68 km · Monterrey 72 km · San Nicolás de los Garza 76 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 Saltillo (25.426°, -100.9796°, elevation 1,578 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).