Apóstoles weather in September

In September, Apóstoles sees average daytime highs of 24°C and overnight lows near 14°C, with 159 mm of rain across 10.2 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 24°C through the month. The sky is clear or mostly clear about 43% 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 Apóstoles's 4th-clearest and 2nd-windiest month. For the whole year in context, see Apóstoles's year-round climate.

Daytime high
24°
8th warmest
Overnight low
14°
5th coldest
Rainfall
159 mm
10.2 wet days
Daylight
11 h 48 min
6:42 AM – 6:32 PM
Cloud cover
51%
4th clearest
Wind
11 km/h
2nd windiest
Solar energy
4.6 kWh/m²
Travel score
7.1
out of 10

Apóstoles is city in Misiones, Argentina.

Founded
1652

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 24°C through the month.

A typical September day in Apóstoles reaches about 24°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 31°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)
12413
22414
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132414
142414
152414
162414
172414
182414
192414
202414
212414
222514
232514
242515
252515
262515
272515
282515
292515
302515

How September really feels in Apóstoles

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.

Apóstoles 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
Jan32° / 21°16013.413.63.9
Feb31° / 21°14812.7134.2
Mar30° / 20°13511.612.25.1
Apr27° / 17°1671011.46.6
May23° / 14°1339.310.66.9
Jun21° / 12°1199.210.36.5
Jul20° / 11°1289.210.46.7
Aug23° / 12°968.3117.3
Sep24° / 14°15910.211.87.1
Oct27° / 16°21912.512.76.2
Nov29° / 18°16610.313.45.6
Dec31° / 20°16712.413.74.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% 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 (%)
15941
25842
35842
45743
55644
65545
75545
85446
95446
105446
115347
125446
135446
145446
155545
165446
175446
185545
195545
205545
215545
225545
235545
245545
255545
265347
275347
285149
295149
305050

Chance of precipitation in September

Any precipitation

Apóstoles gets around 159 mm of rain over 10.2 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 34% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
130
230
330
431
531
631
731
832
932
1032
1133
1233
1333
1434
1534
1634
1734
1835
1935
2035
2135
2236
2336
2436
2536
2636
2737
2837
2937
3037

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
142272470
241262480
341262480
441262490
541262490
641262490
7402624100
8402624100
9402624100
10402624100
11402524110
12402524110
13402524120
14392524120
15392424120
16392424120
17392424130
18392424130
19392425130
20382425130
21382425130
22372425130
23362425140
24352426140
25352426150
26342526160
27332526160
28322526170
29312526180
30302526191

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 7:00 AM to 6:25 AM, and sunset from 6:25 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:006:25
211.46:596:26
311.56:586:26
411.56:576:27
511.56:566:27
611.66:546:28
711.66:536:28
811.66:526:29
911.66:516:29
1011.76:506:30
1111.76:486:30
1211.76:476:31
1311.86:466:31
1411.86:456:31
1511.86:436:32
1611.86:426:32
1711.96:416:33
1811.96:406:33
1911.96:396:34
2012.06:376:34
2112.06:366:35
2212.06:356:35
2312.06:346:36
2412.16:326:36
2512.16:316:37
2612.16:306:37
2712.16:296:38
2812.26:286:38
2912.26:266:39
3012.26:256:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.6 kWh/m².

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 6.74 kWh/m² in December across the year — September's 4.6 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.7Bright
194.7Bright
204.7Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Is September a good time to visit Apóstoles?

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

7.1
Sightseeing
2nd-best month of the year
6.1
Beach & pool
7th-best month of the year

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

What to pack for Apóstoles in September

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

In September, Apóstoles sees daytime highs around 24°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 Apóstoles in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Apóstoles peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateVery highExtremeJan 20UV 14Jun 20UV 4
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun4Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7High
Nov11Extreme
Dec12Extreme

Air quality in Apóstoles 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 Apóstoles 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 Apóstoles?

Apóstoles sits at 27.9°S, 55.8°W, 179 m above sea level, in Argentina. The nearest listed city is Gobernador Virasora, 31 km away.

Topography around Apóstoles

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

Within 3 km, the terrain around Apóstoles has only modest variations in elevation — a maximum elevation change of 91 m around an average of 143 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 212 m; within 80 km, significant variations in elevation — a maximum elevation change of 339 m.

The land around Apóstoles is covered by trees (44%) and grassland (37%) within 3 km, grassland (55%) and trees (41%) within 16 km, and trees (38%) and grassland (33%) within 80 km.

3 km
91 m
16 km
212 m
80 km
339 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Gobernador Virasora 31 km · Garupá 49 km · Leandro N. Alem 55 km · Posadas 60 km · Encarnación 66 km · Santo Tomé 76 km · Oberá 78 km · São Borja 87 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 Apóstoles (-27.9142°, -55.7535°, elevation 179 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).