Quedas do Iguaçu weather in September

In September, Quedas do Iguaçu sees average daytime highs of 26°C and overnight lows near 15°C, with 162 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 26°C through the month. The sky is clear or mostly clear about 46% of the time in September, and the air most often feels dry.

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 Quedas do Iguaçu's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Quedas do Iguaçu's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
5th coldest
Rainfall
162 mm
10.4 wet days
Daylight
11 h 54 min
7:30 AM – 7:22 PM
Cloud cover
49%
3rd clearest
Wind
10 km/h
2nd windiest
Solar energy
4.85 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Quedas do Iguaçu reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 32°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12614
22614
32614
42614
52614
62614
72614
82614
92614
102614
112614
122614
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272615
282615
292615
302615

Quedas do Iguaçu 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
Jan30° / 20°18118.313.44.2
Feb29° / 20°18216.912.94.4
Mar29° / 19°14114.312.25.3
Apr26° / 16°12410.211.46.6
May23° / 13°14910.110.86.9
Jun22° / 12°1429.510.46.8
Jul22° / 12°1148.410.67.1
Aug24° / 13°967.511.17.6
Sep26° / 15°16210.411.86.8
Oct27° / 17°21215.312.65.7
Nov28° / 18°16613.313.25.6
Dec29° / 19°1931713.64.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% 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 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26535
36436
46337
56337
66238
76139
86139
95941
105941
115941
125941
135842
145842
155842
165743
175743
185743
195644
205644
215545
225446
235347
245248
255248
265149
275050
284852
294852
304753

Chance of precipitation in September

Any precipitation

Quedas do Iguaçu gets around 162 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 34% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
125
225
325
426
527
627
728
829
929
1030
1131
1231
1332
1433
1533
1634
1735
1836
1936
2037
2138
2239
2340
2441
2542
2643
2744
2845
2946
3046

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 33% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14238192
24137192
34137202
44036212
54036222
64035233
73934233
83934243
93833253
103833263
113732273
123632284
133632294
143531294
153531305
163430305
173430316
183329316
193329317
203229328
213128328
223028339
2329283310
2428283411
2526283511
2625273512
2724273613
2823263713
2922263814
3021253915

Wind in September

Winds average 10 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
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 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 7:47 AM to 7:15 AM, and sunset from 7:16 PM to 7:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:477:16
211.57:467:16
311.57:457:16
411.57:447:17
511.67:437:17
611.67:427:18
711.67:417:18
811.67:397:18
911.77:387:19
1011.77:377:19
1111.77:367:20
1211.87:357:20
1311.87:347:20
1411.87:337:21
1511.87:317:21
1611.97:307:22
1711.97:297:22
1811.97:287:22
1911.97:277:23
2012.07:267:23
2112.07:257:24
2212.07:247:24
2312.07:227:24
2412.17:217:25
2512.17:207:25
2612.17:197:26
2712.17:187:26
2812.27:177:26
2912.27:167:27
3012.27:157:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.85 kWh/m².

For context, solar energy here swings from a low near 2.92 kWh/m² to a high of 6.3 kWh/m² in December across the year — September's 4.85 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Quedas do Iguaçu?

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

6.8
Sightseeing
4th-best month of the year
6.4
Beach & pool
3rd-best month of the year

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

What to pack for Quedas do Iguaçu in September

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

In September, Quedas do Iguaçu sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Quedas do Iguaçu 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 Quedas do Iguaçu peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 22UV 15Jul 11UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in Quedas do Iguaçu 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 Quedas do Iguaçu is worst in September — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (March, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1619 µg/m³Mar 136 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar6Good
Apr8Good
May7Good
Jun7Good
Jul9Good
Aug12Moderate
Sep20Moderate
Oct13Moderate
Nov9Good
Dec7Good
Location & terrain

Where is Quedas do Iguaçu?

Quedas do Iguaçu sits at 25.5°S, 52.9°W, 564 m above sea level, in Brazil. The nearest listed city is Dois Vizinhos, 35 km away.

Topography around Quedas do Iguaçu

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

Within 3 km, the terrain around Quedas do Iguaçu has only modest variations in elevation — a maximum elevation change of 180 m around an average of 546 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 486 m; within 80 km, large variations in elevation — a maximum elevation change of 920 m.

The land around Quedas do Iguaçu is covered by trees (46%) and cropland (27%) within 3 km, trees (44%) and cropland (35%) within 16 km, and trees (38%), cropland (35%) and grassland (23%) within 80 km.

3 km
180 m
16 km
486 m
80 km
920 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Dois Vizinhos 35 km · Laranjeiras do Sul 49 km · Salto do Lontra 55 km · Chopinzinho 59 km · Coronel Vivida 68 km · Francisco Beltrão 71 km · Realeza 72 km · Ampére 77 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Quedas do Iguaçu (-25.453°, -52.9046°, elevation 564 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).