Mercedes weather in September

In September, Mercedes sees average daytime highs of 23°C and overnight lows near 13°C, with 122 mm of rain across 8.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 47% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Mercedes's 3rd-clearest and 1st-windiest month. For the whole year in context, see Mercedes's year-round climate.

Daytime high
23°
8th warmest
Overnight low
13°
4th coldest
Rainfall
122 mm
8.6 wet days
Daylight
11 h 48 min
6:52 AM – 6:41 PM
Cloud cover
47%
3rd clearest
Wind
15 km/h
1st windiest
Solar energy
4.68 kWh/m²
Travel score
7.3
out of 10

Mercedes is Cuidad de Mercedes Corrientes,Argentina.

Founded
1829

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 23°C through the month.

A typical September day in Mercedes reaches about 23°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 30°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12312
22312
32312
42312
52312
62312
72312
82312
92312
102312
112312
122312
132312
142312
152312
162312
172312
182313
192313
202413
212413
222413
232413
242413
252413
262413
272413
282413
292414
302414

How September really feels in Mercedes

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.

Mercedes weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°14811.413.74.4
Feb31° / 20°11810.3134.7
Mar29° / 19°1329.912.25.7
Apr26° / 16°1739.511.37.0
May22° / 13°1027.810.67.0
Jun20° / 11°957.810.26.5
Jul19° / 847.210.36.8
Aug22° / 11°797.1117.3
Sep23° / 13°1228.611.87.3
Oct26° / 15°19010.712.76.7
Nov28° / 17°1428.713.56.4
Dec30° / 19°1489.913.85.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 41%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26139
36040
46040
55941
65941
75941
85941
95941
105941
115941
125941
135941
145941
155941
165941
175941
185941
196040
206040
216040
226040
236040
246040
255842
265842
275743
285644
295545
305545

Chance of precipitation in September

Any precipitation

Mercedes gets around 122 mm of rain over 8.6 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
230
330
431
531
631
731
830
930
1030
1129
1229
1328
1428
1527
1627
1727
1826
1926
2026
2126
2227
2327
2427
2528
2628
2729
2829
2930
3030

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
156192140
255192240
356182240
456182240
556182240
657182140
757182140
858172050
958172050
1059171950
1160171850
1260181750
1359181760
1460181660
1561181560
1660191560
1760191470
1860191470
1959201470
2058201471
2156211481
2255221481
2355221481
2452231591
2552231591
2650241691
27492416101
28482417101
29472417101
30462418111

Wind in September

Winds average 15 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 7:10 AM to 6:34 AM, and sunset from 6:34 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:106:34
211.47:096:34
311.47:086:35
411.57:076:35
511.57:066:36
611.57:046:36
711.67:036:37
811.67:026:37
911.67:016:38
1011.66:596:38
1111.76:586:39
1211.76:576:39
1311.76:566:40
1411.86:546:40
1511.86:536:41
1611.86:526:41
1711.96:516:42
1811.96:496:42
1911.96:486:43
2011.96:476:44
2112.06:456:44
2212.06:446:45
2312.06:436:45
2412.16:426:46
2512.16:406:46
2612.16:396:47
2712.26:386:47
2812.26:376:48
2912.26:356:48
3012.26:346:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 6.97 kWh/m² in December across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.5Bright
114.5Bright
124.5Bright
134.6Bright
144.6Bright
154.7Bright
164.7Bright
174.8Bright
184.8Bright
194.8Bright
204.9Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Mercedes?

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

7.3
Sightseeing
1st-best month of the year
5.8
Beach & pool
8th-best month of the year

September is one of the better times to visit Mercedes for general sightseeing.

What to pack for Mercedes in September

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

In September, Mercedes sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Mercedes in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mercedes peaks around January 24 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 24UV 14Jun 22UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep7Very high
Oct7Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Mercedes?

Mercedes sits at 29.2°S, 58.1°W, 96 m above sea level, in Argentina. The nearest listed city is Curuzú Cuatiá, 68 km away.

Topography around Mercedes

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

Within 3 km, the terrain around Mercedes has only modest variations in elevation — a maximum elevation change of 38 m around an average of 90 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 75 m; within 80 km, only modest variations in elevation — a maximum elevation change of 103 m.

The land around Mercedes is covered by grassland (70%) within 3 km, grassland (90%) within 16 km, and grassland (72%) within 80 km.

3 km
38 m
16 km
75 m
80 km
103 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Curuzú Cuatiá 68 km · Paso de los Libres 112 km · Uruguaiana 115 km · Goya 115 km · Saladas 116 km · Monte Caseros 126 km · San Lorenzo 135 km · Villa Ocampo 147 km

Argentina travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / I
220 V · 50 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$14,898
2025
Happiness
6.4 / 10
World Happiness, 2025
Homicide rate
4.5
per 100k, 2023
Road deaths
14.1
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 575
Religion
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 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 Mercedes (-29.1842°, -58.0752°, elevation 96 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).