Salamanca weather in September

In September, Salamanca sees average daytime highs of 27°C and overnight lows near 15°C, with 122 mm of rain across 16 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 16% 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 Salamanca's 12th-clearest and 5th-windiest month. For the whole year in context, see Salamanca's year-round climate.

Daytime high
27°
8th warmest
Overnight low
15°
8th coldest
Rainfall
122 mm
16 wet days
Daylight
12 h 06 min
6:36 AM – 6:43 PM
Cloud cover
68%
12th clearest
Wind
7 km/h
5th windiest
Solar energy
5.56 kWh/m²
Travel score
5.5
out of 10

Salamanca is municipal seat of Salamanca, State of Guanajuato, Mexico.

Air quality
Moderate
PM10 38.5 µg/m³ · 2018
Founded
1603

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 27°C through the month.

A typical September day in Salamanca reaches about 27°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12716
22716
32716
42716
52716
62716
72716
82716
92716
102716
112716
122716
132716
142716
152716
162716
172716
182715
192715
202715
212715
222715
232715
242715
252715
262715
272715
282715
292715
302715

How September really feels in Salamanca

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Salamanca weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 101.910.98.6
Feb27° / 10°122.111.38.2
Mar29° / 12°111.811.96.9
Apr31° / 14°92.212.55.3
May32° / 16°376.3134.4
Jun30° / 17°13514.713.24.4
Jul28° / 16°17020.313.14.9
Aug28° / 16°1461812.75.2
Sep27° / 15°1221612.15.5
Oct27° / 14°396.911.57.0
Nov26° / 11°132.5118.2
Dec25° / 41.110.88.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33664
43664
53664
63565
73565
83664
93664
103664
113664
123763
133664
143664
153763
163862
173862
183862
193763
203862
213862
223763
233862
243862
253961
263961
274159
284159
294159
304258

Chance of precipitation in September

Any precipitation

Salamanca gets around 122 mm of rain over 16 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 52% and peaks near 62% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
161
261
361
461
562
662
762
861
961
1060
1160
1259
1358
1457
1556
1655
1753
1852
1951
2049
2148
2246
2344
2442
2541
2639
2738
2837
2936
3036

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 (%)
1144838
2144839
3144739
4144739
5144639
6154639
7154639
8154639
9164539
10164539
11174538
12174538
13184537
14184536
15194635
16204634
17214633
18224632
19234731
20244729
21264628
22284626
23304525
24324523
25344421
26364420
27384418
28404317
29414315
30434314

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
228calm
238calm
248calm
258calm
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 6:32 AM to 6:39 AM, and sunset from 6:57 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:326:57
212.46:326:56
312.46:336:55
412.46:336:54
512.36:336:53
612.36:336:52
712.36:346:51
812.36:346:50
912.36:346:49
1012.26:346:48
1112.26:346:47
1212.26:356:46
1312.26:356:46
1412.26:356:45
1512.16:356:44
1612.16:366:43
1712.16:366:42
1812.16:366:41
1912.16:366:40
2012.06:376:39
2112.06:376:38
2212.06:376:37
2312.06:376:36
2412.06:386:35
2511.96:386:34
2611.96:386:33
2711.96:386:32
2811.96:396:31
2911.96:396:30
3011.86:396:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.56 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 7.47 kWh/m² in April across the year — September's 5.56 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
Planning a trip in September

Hazard calendar for Salamanca

In seasonPeak

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

Salamanca'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 Salamanca?

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

5.5
Sightseeing
7th-best month of the year
5.6
Beach & pool
10th-best month of the year

September is a reasonable time to visit Salamanca for sightseeing.

What to pack for Salamanca in September

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

In September, Salamanca sees daytime highs around 27°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 16 days see rain.

rain gearlight clothessun protection

UV index in Salamanca 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 Salamanca peaks around June 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highJun 14UV 14Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun14Extreme
Jul12Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Salamanca 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 Salamanca is worst in May — around 27 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1226 µg/m³Oct 1517 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb23Moderate
Mar20Moderate
Apr24Moderate
May27Moderate
Jun18Moderate
Jul21Moderate
Aug18Moderate
Sep19Moderate
Oct17Moderate
Nov21Moderate
Dec26Moderate
Location & terrain

Where is Salamanca?

Salamanca sits at 20.6°N, 101.2°W, 1,715 m above sea level, in Mexico. The nearest listed city is Valle de Santiago, 20 km away.

Topography around Salamanca

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

Within 3 km, the terrain around Salamanca has only modest variations in elevation — a maximum elevation change of 43 m around an average of 1,714 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 483 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,431 m.

The land around Salamanca is covered by artificial surfaces (70%) within 3 km, cropland (65%) within 16 km, and cropland (36%) and shrubs (27%) within 80 km.

3 km
43 m
16 km
483 m
80 km
1,431 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Valle de Santiago 20 km · Irapuato 20 km · Villagrán 22 km · Juventino Rosas 23 km · Jaral del Progreso 26 km · Cortazar 26 km · Abasolo 37 km · Celaya 40 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 Salamanca (20.5698°, -101.1977°, elevation 1,715 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).