Iguape weather in September

In September, Iguape sees average daytime highs of 22°C and overnight lows near 19°C, with 104 mm of rain across 12.7 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 22% 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 Iguape's 9th-clearest and 3rd-windiest month. For the whole year in context, see Iguape's year-round climate.

Daytime high
22°
9th warmest
Overnight low
19°
4th coldest
Rainfall
104 mm
12.7 wet days
Daylight
11 h 54 min
7:09 AM – 7:00 PM
Cloud cover
69%
9th clearest
Wind
14 km/h
3rd windiest
Solar energy
4.12 kWh/m²
Travel score
6.1
out of 10

Iguape is human settlement in Brazil.

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 22°C through the month.

A typical September day in Iguape reaches about 22°C in the afternoon and slips back to 19°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12218
22218
32218
42218
52218
62218
72218
82218
92218
102219
112219
122219
132219
142219
152219
162219
172219
182219
192219
202219
212219
222219
232219
242219
252219
262219
272219
282219
292219
302219

Iguape weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°21720.113.44.8
Feb28° / 24°2061712.94.9
Mar27° / 24°17318.812.25.2
Apr26° / 22°10313.811.46.1
May23° / 20°10313.310.86.4
Jun22° / 18°909.810.56.7
Jul21° / 17°859.910.66.6
Aug21° / 17°659.111.16.6
Sep22° / 19°10412.711.86.1
Oct23° / 20°10514.212.65.9
Nov25° / 22°11114.813.25.9
Dec27° / 23°1401613.55.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
24852
34753
44654
54555
64357
74258
84258
94060
103961
113961
123763
133664
143763
153763
163565
173565
183565
193466
203367
213367
223367
233367
243169
253070
263070
273070
282872
292872
302872

Chance of precipitation in September

Any precipitation

Iguape gets around 104 mm of rain over 12.7 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 41% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
133
234
334
435
535
636
736
837
937
1037
1137
1238
1338
1439
1539
1640
1741
1842
1943
2044
2145
2246
2347
2448
2549
2649
2750
2850
2950
3050

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 42% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
161649290
261648300
351647310
451646320
551645330
641744340
741744350
841744351
941744351
1031644361
1131644361
1231644361
1331644371
1431544371
1531543381
1631543381
1731543381
1841542381
1941542382
2041541382
2141541382
2241441392
2341440392
2441440402
2541439412
2641438422
2741338422
2841337433
2941337443
3031336443

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 12 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
112light breeze
212light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 7:25 AM to 6:53 AM, and sunset from 6:55 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:256:55
211.57:246:55
311.57:236:55
411.67:226:56
511.67:216:56
611.67:206:57
711.67:196:57
811.77:186:57
911.77:176:58
1011.77:156:58
1111.77:146:58
1211.87:136:59
1311.87:126:59
1411.87:117:00
1511.87:107:00
1611.97:097:00
1711.97:087:01
1811.97:077:01
1911.97:057:01
2012.07:047:02
2112.07:037:02
2212.07:027:03
2312.07:017:03
2412.17:007:03
2512.16:597:04
2612.16:587:04
2712.16:577:04
2812.26:567:05
2912.26:547:05
3012.26:537:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 2.83 kWh/m² to a high of 5.97 kWh/m² in December across the year — September's 4.12 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Iguape?

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

6.1
Sightseeing
5th-best month of the year
4.3
Beach & pool
10th-best month of the year

September is a reasonable time to visit Iguape for sightseeing.

What to pack for Iguape in September

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

In September, Iguape sees daytime highs around 22°C and nights near 19°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Iguape in September

The nearest coast averages about 20°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 km away) is warmest in February at about 27°C and coldest in August near 19°C.

It's comfortable for a long swim from Sep 6 to Jul 12 — about 10.2 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May23Refreshing
Jun21Refreshing
Jul20Cool
Aug19Cool
Sep20Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Iguape 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 Iguape peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighHighVery highExtremeJan 19UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug7High
Sep7High
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in Iguape 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 Iguape is worst in July — around 19 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (March, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 2319 µg/m³Mar 1510 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar10Good
Apr11Good
May13Moderate
Jun18Moderate
Jul19Moderate
Aug19Moderate
Sep17Moderate
Oct14Moderate
Nov12Good
Dec12Good
Location & terrain

Where is Iguape?

Iguape sits at 24.7°S, 47.6°W, 8 m above sea level, in Brazil. The nearest listed city is Pariquera-Açu, 33 km away.

Topography around Iguape

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

Within 3 km, the terrain around Iguape has significant variations in elevation — a maximum elevation change of 348 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 494 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,482 m.

The land around Iguape is covered by trees (44%) within 3 km, trees (51%) and water (36%) within 16 km, and trees (63%) and water (32%) within 80 km.

3 km
348 m
16 km
494 m
80 km
1,482 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Pariquera-Açu 33 km · Registro 38 km · Juquiá 44 km · Jacupiranga 45 km · Miracatu 48 km · Cajati 57 km · Itariri 60 km · Peruíbe 71 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 Iguape (-24.7081°, -47.5553°, elevation 8 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).