Leandro N. Alem weather in September

In September, Leandro N. Alem sees average daytime highs of 25°C and overnight lows near 14°C, with 158 mm of rain across 10.4 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 6th-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 45% 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 Leandro N. Alem's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Leandro N. Alem's year-round climate.

Daytime high
25°
8th warmest
Overnight low
14°
5th coldest
Rainfall
158 mm
10.4 wet days
Daylight
11 h 48 min
6:40 AM – 6:31 PM
Cloud cover
50%
3rd clearest
Wind
11 km/h
3rd windiest
Solar energy
4.58 kWh/m²
Travel score
7.0
out of 10

Leandro N. Alem is city in Misiones, Argentina.

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 Leandro N. Alem reaches about 25°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 32°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)
12414
22414
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132414
142414
152414
162414
172414
182514
192514
202514
212514
222514
232514
242515
252515
262515
272515
282515
292515
302515

How September really feels in Leandro N. Alem

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.

Leandro N. Alem weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 21°17215.413.53.9
Feb30° / 20°15715.1134.2
Mar29° / 19°14312.912.25.1
Apr26° / 17°16310.311.46.7
May22° / 13°1509.810.76.8
Jun21° / 12°1349.110.36.5
Jul20° / 11°1309.510.46.6
Aug23° / 13°978.3117.4
Sep25° / 14°15810.411.87.0
Oct27° / 16°22113.612.76.1
Nov29° / 18°17111.613.45.6
Dec31° / 20°17514.113.74.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
25941
35941
45941
55743
65644
75644
85644
95545
105545
115545
125545
135545
145545
155545
165446
175446
185446
195446
205347
215347
225347
235248
245248
255248
265149
275050
284951
294852
304753

Chance of precipitation in September

Any precipitation

Leandro N. Alem gets around 158 mm of rain over 10.4 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 35% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
229
330
430
530
631
731
832
932
1032
1133
1233
1334
1434
1535
1635
1736
1836
1936
2037
2137
2238
2338
2438
2539
2639
2739
2840
2940
3040

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14231234
24131234
34131245
44031245
54030246
64030246
74030247
83929247
93929248
103928248
113928249
123828259
1338272510
1438272510
1537262511
1637262511
1737262611
1837252612
1937252712
2036242712
2136242812
2235242812
2334242913
2434242913
2533243014
2632243015
2731243015
2830243016
2929243017
3028243018

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 6:58 AM to 6:24 AM, and sunset from 6:24 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.46:586:24
211.56:576:24
311.56:566:25
411.56:556:25
511.56:546:26
611.66:526:26
711.66:516:27
811.66:506:27
911.66:496:28
1011.76:486:28
1111.76:476:28
1211.76:456:29
1311.86:446:29
1411.86:436:30
1511.86:426:30
1611.86:406:31
1711.96:396:31
1811.96:386:32
1911.96:376:32
2012.06:366:33
2112.06:346:33
2212.06:336:34
2312.06:326:34
2412.16:316:35
2512.16:306:35
2612.16:286:36
2712.16:276:36
2812.26:266:37
2912.26:256:37
3012.26:246:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 2.61 kWh/m² to a high of 6.56 kWh/m² in December across the year — September's 4.58 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Leandro N. Alem?

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

7.0
Sightseeing
2nd-best month of the year
6.1
Beach & pool
5th-best month of the year

September is one of the better times to visit Leandro N. Alem for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Leandro N. Alem in September

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

In September, Leandro N. Alem sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Leandro N. Alem in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Leandro N. Alem peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateVery highExtremeJan 19UV 14Jun 21UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct8Very high
Nov11Extreme
Dec12Extreme

Air quality in Leandro N. Alem 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 Leandro N. Alem is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (March, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1317 µg/m³Mar 157 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar7Good
Apr7Good
May7Good
Jun8Good
Jul9Good
Aug14Moderate
Sep17Moderate
Oct11Good
Nov8Good
Dec7Good
Location & terrain

Where is Leandro N. Alem?

Leandro N. Alem sits at 27.6°S, 55.3°W, 302 m above sea level, in Argentina. The nearest listed city is Oberá, 24 km away.

Topography around Leandro N. Alem

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

Within 3 km, the terrain around Leandro N. Alem has only modest variations in elevation — a maximum elevation change of 128 m around an average of 293 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 257 m; within 80 km, significant variations in elevation — a maximum elevation change of 476 m.

The land around Leandro N. Alem is covered by trees (58%) and grassland (25%) within 3 km, trees (77%) and grassland (22%) within 16 km, and trees (56%) and grassland (27%) within 80 km.

3 km
128 m
16 km
257 m
80 km
476 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Oberá 24 km · Garupá 52 km · Apóstoles 55 km · Encarnación 62 km · Jardín América 63 km · Posadas 64 km · Trinidad 65 km · Santo Cristo 70 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 Leandro N. Alem (-27.6038°, -55.3237°, elevation 302 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).