Santa Catarina weather in September

In September, Santa Catarina sees average daytime highs of 27°C and overnight lows near 19°C, with 118 mm of rain across 11.6 wet days and about 12.2 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 26°C by the end. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels muggy.

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 Santa Catarina's 12th-clearest and 8th-windiest month. For the whole year in context, see Santa Catarina's year-round climate.

Daytime high
27°
5th warmest
Overnight low
19°
9th coldest
Rainfall
118 mm
11.6 wet days
Daylight
12 h 06 min
6:32 AM – 6:41 PM
Cloud cover
51%
12th clearest
Wind
6 km/h
8th windiest
Solar energy
5.23 kWh/m²
Travel score
6.2
out of 10

Santa Catarina is municipal seat of Santa Catarina, State of Nuevo León, Mexico.

Density
309/km²
people per km²
Founded
1596

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 26°C by the end.

A typical September day in Santa Catarina reaches about 27°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 31°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12920
22920
32920
42920
52820
62820
72819
82819
92819
102819
112819
122819
132819
142719
152719
162719
172719
182719
192719
202718
212718
222718
232718
242718
252718
262718
272618
282617
292617
302617

Santa Catarina weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan18° / 315.610.66.8
Feb21° / 10°285.211.17.4
Mar24° / 13°446.911.87.7
Apr27° / 16°407.112.67.1
May29° / 19°468.513.25.9
Jun30° / 20°425.913.65.5
Jul30° / 20°50613.45.4
Aug30° / 20°365.312.95.5
Sep27° / 19°11811.612.26.2
Oct25° / 15°58711.47.7
Nov21° / 11°345.410.77.5
Dec19° / 264.810.47.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
25941
35842
45743
55644
65545
75545
85446
95347
105347
115347
125347
135347
145347
155446
165446
175446
185644
195644
205842
215842
226040
236139
246337
256535
266634
276832
286931
296931
307129

Chance of precipitation in September

Any precipitation

Santa Catarina gets around 118 mm of rain over 11.6 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 37% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
132
233
335
436
537
639
740
841
941
1042
1142
1242
1342
1442
1542
1641
1741
1840
1939
2038
2137
2236
2335
2433
2532
2631
2730
2829
2929
3028

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 45% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
131242421
231240432
331239442
431238452
531237462
631236472
731135483
831134493
931134493
1031033513
1141033503
1241033503
1341033503
1441033503
1541033503
1651133492
1751133482
1861233472
1971333462
2081333451
2191433431
22101533411
23111633391
24121732381
25131832361
26131933341
27142033331
28152033311
29152034301
30162134291

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 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
106calm
116calm
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 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 6:26 AM to 6:38 AM, and sunset from 6:57 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:266:57
212.56:266:56
312.56:266:55
412.56:276:54
512.46:276:53
612.46:286:52
712.46:286:51
812.46:296:50
912.36:296:49
1012.36:296:47
1112.36:306:46
1212.36:306:45
1312.26:306:44
1412.26:316:43
1512.26:316:42
1612.16:326:41
1712.16:326:39
1812.16:336:38
1912.16:336:37
2012.06:336:36
2112.06:346:35
2212.06:346:34
2312.06:356:33
2411.96:356:31
2511.96:356:30
2611.96:366:29
2711.96:366:28
2811.86:376:27
2911.86:376:26
3011.86:386:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.23 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 6.81 kWh/m² in June across the year — September's 5.23 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Is September a good time to visit Santa Catarina?

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

6.2
Sightseeing
8th-best month of the year
6.7
Beach & pool
7th-best month of the year

September is a reasonable time to visit Santa Catarina for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santa Catarina in September

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

In September, Santa Catarina sees daytime highs around 27°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Santa Catarina 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 Santa Catarina peaks around June 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 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 17UV 12Dec 18UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov6High
Dec5High

Air quality in Santa Catarina 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 Santa Catarina is worst in December — around 24 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateDec 1724 µg/m³Aug 1518 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb21Moderate
Mar24Moderate
Apr21Moderate
May22Moderate
Jun20Moderate
Jul19Moderate
Aug18Moderate
Sep20Moderate
Oct20Moderate
Nov22Moderate
Dec24Moderate
Location & terrain

Where is Santa Catarina?

Santa Catarina sits at 25.7°N, 100.5°W, 675 m above sea level, in Mexico. The nearest listed city is San Pedro Garza García, 6.0 km away.

Topography around Santa Catarina

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

Within 3 km, the terrain around Santa Catarina has large variations in elevation — a maximum elevation change of 949 m around an average of 751 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,177 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,485 m.

The land around Santa Catarina is covered by artificial surfaces (68%) and shrubs (25%) within 3 km, shrubs (47%), artificial surfaces (27%) and trees (23%) within 16 km, and shrubs (58%) and trees (27%) within 80 km.

3 km
949 m
16 km
2,177 m
80 km
3,485 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: San Pedro Garza García 6.0 km · Mitras Poniente 12 km · Parque Industrial Ciudad Mitras 13 km · Monterrey 14 km · San Nicolás de los Garza 17 km · García 19 km · Ciudad General Escobedo 20 km · Guadalupe 20 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 Santa Catarina (25.6732°, -100.4581°, elevation 675 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).