Concepción weather in September

In September, Concepción sees average daytime highs of 29°C and overnight lows near 18°C, with 103 mm of rain across 8.4 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Concepción's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Concepción's year-round climate.

Daytime high
29°
8th warmest
Overnight low
18°
5th coldest
Rainfall
103 mm
8.4 wet days
Daylight
11 h 54 min
6:48 AM – 6:40 PM
Cloud cover
44%
2nd clearest
Wind
13 km/h
2nd windiest
Solar energy
5.03 kWh/m²
Travel score
5.8
out of 10

Concepción is city and department capital of Concepcion, Paraguay.

Density
44/km²
people per km²
Founded
1787

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 29°C through the month.

A typical September day in Concepción reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 37°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
12917
22917
32917
42917
52917
62917
72917
82918
92918
102918
112918
122918
132918
142918
152918
162918
172918
182918
192918
202918
212918
222918
232918
243018
253019
263019
273019
283019
293019
303019

How September really feels in Concepción

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.

Concepción weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 24°14813.513.33.1
Feb33° / 23°13612.912.83.4
Mar32° / 22°12911.512.24.0
Apr30° / 20°1318.611.55.5
May26° / 17°1429.510.96.9
Jun25° / 16°928.110.67.3
Jul25° / 14°706.810.77.7
Aug27° / 16°666.411.27.2
Sep29° / 18°1038.411.95.8
Oct31° / 21°17712.112.54.4
Nov31° / 21°17911.913.14.1
Dec33° / 23°17614.513.43.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26832
36832
46733
56733
66634
76634
86535
96436
106436
116436
126436
136436
146436
156436
166436
176337
186238
196238
206238
216139
226139
236040
245941
255842
265743
275644
285545
295545
305446

Chance of precipitation in September

Any precipitation

Concepción gets around 103 mm of rain over 8.4 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 28% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
119
220
320
421
521
622
722
823
923
1024
1125
1226
1326
1427
1528
1629
1729
1830
1931
2031
2132
2233
2333
2434
2534
2635
2735
2836
2936
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
135292780
235292790
334292891
434292891
533282891
633282991
7322729101
8322730101
9312631111
10312531111
11302432121
12302432132
13292332142
14282332152
15282232162
16272232182
17272131192
18262130202
19252129223
20252029233
21242028243
22232027264
23222027274
24212027285
25201927295
26191927305
27181927316
28171827326
29161827326
30151827337

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 7:04 AM to 6:33 AM, and sunset from 6:35 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:046:35
211.57:036:35
311.67:026:36
411.67:016:36
511.67:006:36
611.66:596:37
711.76:586:37
811.76:576:37
911.76:566:38
1011.76:546:38
1111.86:536:38
1211.86:526:39
1311.86:516:39
1411.86:506:39
1511.86:496:40
1611.96:486:40
1711.96:476:40
1811.96:466:41
1911.96:456:41
2012.06:446:41
2112.06:436:42
2212.06:426:42
2312.06:416:42
2412.16:406:43
2512.16:386:43
2612.16:376:43
2712.16:366:44
2812.16:356:44
2912.26:346:44
3012.26:336:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 2.98 kWh/m² to a high of 6.57 kWh/m² in January across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
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 Concepción?

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

5.8
Sightseeing
5th-best month of the year
7.4
Beach & pool
2nd-best month of the year

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

What to pack for Concepción in September

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

In September, Concepción sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Concepción 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 Concepción peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 18UV 15Jul 12UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar13Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7High
Sep7High
Oct9Very high
Nov13Extreme
Dec13Extreme

Air quality in Concepción 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 Concepción is worst in September — around 38 µg/m³ PM2.5 (poor), about 5.6× the cleanest month (April, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1437 µg/m³Apr 197 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb10Good
Mar9Good
Apr7Good
May8Good
Jun9Good
Jul15Moderate
Aug32Moderate
Sep38Poor
Oct26Moderate
Nov17Moderate
Dec9Good
Location & terrain

Where is Concepción?

Concepción sits at 23.4°S, 57.4°W, 78 m above sea level, in Paraguay. The nearest listed city is Yby Yaú, 103 km away.

Yby YaúBela VistaVilla HayesLimpioPedro Juan CaballeroPonta PorãMariano Roque AlonsoAsuncion

Topography around Concepción

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

Within 3 km, the terrain around Concepción has only modest variations in elevation — a maximum elevation change of 26 m around an average of 77 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 96 m; within 80 km, significant variations in elevation — a maximum elevation change of 327 m.

The land around Concepción is covered by grassland (33%), trees (30%) and artificial surfaces (29%) within 3 km, trees (45%) and grassland (45%) within 16 km, and grassland (47%) and trees (45%) within 80 km.

3 km
26 m
16 km
96 m
80 km
327 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Yby Yaú 103 km · Bela Vista 171 km · Villa Hayes 189 km · Limpio 196 km · Pedro Juan Caballero 198 km · Ponta Porã 199 km · Mariano Roque Alonso 201 km · Asuncion 211 km

Paraguay travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / N
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$7,027
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
64%
of population, 2024
Homicide rate
6.8
per 100k, 2023
Road deaths
22
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 531
Religion
Roman Catholic 80%Protestant 7%Believer 6%other 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 Concepción (-23.3999°, -57.4324°, elevation 78 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).