Iguaí weather in September

In September, Iguaí sees average daytime highs of 26°C and overnight lows near 18°C, with 40 mm of rain across 11.6 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 11th-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 20% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Iguaí's 1st-clearest and 3rd-windiest month. For the whole year in context, see Iguaí's year-round climate.

Daytime high: 26°; 9th warmest
Overnight low: 18°; 4th coldest
Rainfall: 40 mm; 11.6 wet days
Daylight: 11 h 54 min; 5:37 AM – 5:32 PM
Cloud cover: 61%; 1st clearest
Wind: 9 km/h; 3rd windiest
Solar energy: 4.75 kWh/m²
Travel score: 6.3; out of 10

Iguaí is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Iguaí year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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 Iguaí reaches about 26°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	27	27	27	27	27	27	27	27	27	27	27	27	27	27
Avg low (°C)	17	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18

	Avg high (°C)	Avg low (°C)
1	26	17
2	26	17
3	26	17
4	26	17
5	26	17
6	26	17
7	26	17
8	26	17
9	26	17
10	26	17
11	26	17
12	26	17
13	26	17
14	26	18
15	26	18
16	26	18
17	27	18
18	27	18
19	27	18
20	27	18
21	27	18
22	27	18
23	27	18
24	27	18
25	27	18
26	27	18
27	27	18
28	27	18
29	27	18
30	27	18

Iguaí weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 21°	84	15.1	12.8	4.7
Feb	29° / 21°	65	14.1	12.5	4.6
Mar	29° / 21°	97	17.4	12.1	4.5
Apr	28° / 20°	72	17	11.7	5.0
May	27° / 19°	48	12.2	11.3	6.1
Jun	25° / 18°	42	12.9	11.1	6.3
Jul	25° / 17°	44	13.8	11.2	6.3
Aug	25° / 17°	40	13.1	11.5	6.3
Sep	26° / 18°	40	11.6	11.9	6.3
Oct	28° / 19°	63	12.8	12.3	5.9
Nov	28° / 20°	123	15.9	12.7	5.2
Dec	29° / 20°	111	15.1	12.9	4.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 28% of September, with mostly cloudy or overcast conditions the remaining 53%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	48	48	48	49	48	48	49	48	47	48	47	47	48	48	48	48	49	48	48	48	47	47	46	46	45	45	45	45	44	43
Cloudier (%)	52	52	52	51	52	52	51	52	53	52	53	53	52	52	52	52	51	52	52	52	53	53	54	54	55	55	55	55	56	57

	Clearer (%)	Cloudier (%)
1	48	52
2	48	52
3	48	52
4	49	51
5	48	52
6	48	52
7	49	51
8	48	52
9	47	53
10	48	52
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	48	52
17	49	51
18	48	52
19	48	52
20	48	52
21	47	53
22	47	53
23	46	54
24	46	54
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	43	57

Chance of precipitation in September

Any precipitation

Iguaí gets around 40 mm of rain over 11.6 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 39% and peaks near 40% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	38	38	38	38	38	39	39	39	39	39	39	39	39	39	40	40	40	40	40	40	39	39	38	38	38	37	37	37	37	37

	Rain chance (%)
1	38
2	38
3	38
4	38
5	38
6	39
7	39
8	39
9	39
10	39
11	39
12	39
13	39
14	39
15	40
16	40
17	40
18	40
19	40
20	40
21	39
22	39
23	38
24	38
25	38
26	37
27	37
28	37
29	37
30	37

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Comfortable (%)	13	13	13	14	13	13	13	12	12	11	10	10	9	8	8	7	7	6	6	6	5	5	5	5	5	4	4	4	4	4
Humid (%)	63	62	62	60	61	61	61	62	61	61	62	61	61	61	60	59	58	58	56	54	54	52	50	48	46	44	43	41	40	39
Muggy (%)	23	24	24	25	25	26	26	26	27	28	28	29	30	31	32	34	35	36	38	40	41	43	45	47	49	52	53	55	56	56
Oppressive (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	1	13	63	23	0
2	1	13	62	24	0
3	1	13	62	24	0
4	1	14	60	25	0
5	1	13	61	25	0
6	0	13	61	26	0
7	0	13	61	26	0
8	0	12	62	26	0
9	0	12	61	27	0
10	0	11	61	28	0
11	0	10	62	28	0
12	0	10	61	29	0
13	0	9	61	30	0
14	0	8	61	31	0
15	0	8	60	32	0
16	0	7	59	34	0
17	0	7	58	35	0
18	0	6	58	36	0
19	0	6	56	38	0
20	0	6	54	40	0
21	0	5	54	41	0
22	0	5	52	43	0
23	0	5	50	45	0
24	0	5	48	47	0
25	0	5	46	49	0
26	0	4	44	52	0
27	0	4	43	53	0
28	0	4	41	55	0
29	0	4	40	56	0
30	0	4	39	56	1

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	8	8	8	8	8	8	8	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	9	calm
19	9	calm
20	9	calm
21	9	calm
22	9	calm
23	9	calm
24	9	calm
25	9	calm
26	9	calm
27	9	calm
28	9	calm
29	9	calm
30	9	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over September. Sunrise moves from 5:49 AM to 5:26 AM, and sunset from 5:31 PM to 5:33 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	5:49	5:48	5:47	5:47	5:46	5:45	5:44	5:43	5:43	5:42	5:41	5:40	5:40	5:39	5:38	5:37	5:36	5:36	5:35	5:34	5:33	5:32	5:32	5:31	5:30	5:29	5:28	5:28	5:27	5:26
Sunset (PM)	5:31	5:31	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	5:49	5:31
2	11.7	5:48	5:31
3	11.7	5:47	5:32
4	11.8	5:47	5:32
5	11.8	5:46	5:32
6	11.8	5:45	5:32
7	11.8	5:44	5:32
8	11.8	5:43	5:32
9	11.8	5:43	5:32
10	11.8	5:42	5:32
11	11.8	5:41	5:32
12	11.9	5:40	5:32
13	11.9	5:40	5:32
14	11.9	5:39	5:32
15	11.9	5:38	5:32
16	11.9	5:37	5:32
17	11.9	5:36	5:32
18	11.9	5:36	5:32
19	12.0	5:35	5:32
20	12.0	5:34	5:32
21	12.0	5:33	5:33
22	12.0	5:32	5:33
23	12.0	5:32	5:33
24	12.0	5:31	5:33
25	12.0	5:30	5:33
26	12.1	5:29	5:33
27	12.1	5:28	5:33
28	12.1	5:28	5:33
29	12.1	5:27	5:33
30	12.1	5:26	5:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.75 kWh/m².

For context, solar energy here swings from a low near 3.37 kWh/m² to a high of 5.87 kWh/m² in January across the year — September's 4.75 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.4	4.5	4.5	4.5	4.5	4.6	4.6	4.6	4.6	4.7	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.9	4.9	4.9	4.9	4.9	5.0	5.0	5.0	5.0	5.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.5	Bright
3	4.5	Bright
4	4.5	Bright
5	4.5	Bright
6	4.6	Bright
7	4.6	Bright
8	4.6	Bright
9	4.6	Bright
10	4.7	Bright
11	4.7	Bright
12	4.7	Bright
13	4.7	Bright
14	4.8	Bright
15	4.8	Bright
16	4.8	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.8	Bright
21	4.9	Bright
22	4.9	Bright
23	4.9	Bright
24	4.9	Bright
25	4.9	Bright
26	5.0	Bright
27	5.0	Bright
28	5.0	Bright
29	5.0	Bright
30	5.0	Bright

Planning a trip in September

Is September a good time to visit Iguaí?

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

6.3

Sightseeing

1st-best month of the year

6.2

Beach & pool

2nd-best month of the year

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

What to pack for Iguaí in September

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

In September, Iguaí sees daytime highs around 26°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

UV index in Iguaí in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iguaí peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 8 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	15	15	12	9	8	8	10	11	13	14	13
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	15	Extreme
Mar	15	Extreme
Apr	12	Extreme
May	9	Very high
Jun	8	Very high
Jul	8	Very high
Aug	10	Very high
Sep	11	Extreme
Oct	13	Extreme
Nov	14	Extreme
Dec	13	Extreme

Location & terrain

Where is Iguaí?

Iguaí sits at 14.8°S, 40.1°W, 354 m above sea level, in Brazil. The nearest listed city is Poções, 39 km away.

Topography around Iguaí

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

Within 3 km, the terrain around Iguaí has only modest variations in elevation — a maximum elevation change of 196 m around an average of 383 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 923 m; within 80 km, large variations in elevation — a maximum elevation change of 1,109 m.

The land around Iguaí is covered by grassland (84%) within 3 km, grassland (68%) and trees (31%) within 16 km, and grassland (61%) and trees (37%) within 80 km.

3 km

196 m

grassland 84%

16 km

923 m

grassland 68%

80 km

1,109 m

grassland 61%

treesshrubsgrasslandartificial surfaces

← August Iguaí year-round climate October →Best places to visit in September

September weather nearby: Poções 39 km · Itororó 40 km · Planalto 42 km · Barra do Choça 54 km · Ibicaraí 55 km · Itapetinga 57 km · Itagibá 59 km · Coaraci 59 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

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 Iguaí (-14.7564°, -40.0892°, elevation 354 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	26	17
2	26	17
3	26	17
4	26	17
5	26	17
6	26	17
7	26	17
8	26	17
9	26	17
10	26	17
11	26	17
12	26	17
13	26	17
14	26	18
15	26	18
16	26	18
17	27	18
18	27	18
19	27	18
20	27	18
21	27	18
22	27	18
23	27	18
24	27	18
25	27	18
26	27	18
27	27	18
28	27	18
29	27	18
30	27	18

	Clearer (%)	Cloudier (%)
1	48	52
2	48	52
3	48	52
4	49	51
5	48	52
6	48	52
7	49	51
8	48	52
9	47	53
10	48	52
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	48	52
17	49	51
18	48	52
19	48	52
20	48	52
21	47	53
22	47	53
23	46	54
24	46	54
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	43	57

	Rain chance (%)
1	38
2	38
3	38
4	38
5	38
6	39
7	39
8	39
9	39
10	39
11	39
12	39
13	39
14	39
15	40
16	40
17	40
18	40
19	40
20	40
21	39
22	39
23	38
24	38
25	38
26	37
27	37
28	37
29	37
30	37

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	1	13	63	23	0
2	1	13	62	24	0
3	1	13	62	24	0
4	1	14	60	25	0
5	1	13	61	25	0
6	0	13	61	26	0
7	0	13	61	26	0
8	0	12	62	26	0
9	0	12	61	27	0
10	0	11	61	28	0
11	0	10	62	28	0
12	0	10	61	29	0
13	0	9	61	30	0
14	0	8	61	31	0
15	0	8	60	32	0
16	0	7	59	34	0
17	0	7	58	35	0
18	0	6	58	36	0
19	0	6	56	38	0
20	0	6	54	40	0
21	0	5	54	41	0
22	0	5	52	43	0
23	0	5	50	45	0
24	0	5	48	47	0
25	0	5	46	49	0
26	0	4	44	52	0
27	0	4	43	53	0
28	0	4	41	55	0
29	0	4	40	56	0
30	0	4	39	56	1

	Avg high (°C)	Avg low (°C)
1	26	17
2	26	17
3	26	17
4	26	17
5	26	17
6	26	17
7	26	17
8	26	17
9	26	17
10	26	17
11	26	17
12	26	17
13	26	17
14	26	18
15	26	18
16	26	18
17	27	18
18	27	18
19	27	18
20	27	18
21	27	18
22	27	18
23	27	18
24	27	18
25	27	18
26	27	18
27	27	18
28	27	18
29	27	18
30	27	18

	Clearer (%)	Cloudier (%)
1	48	52
2	48	52
3	48	52
4	49	51
5	48	52
6	48	52
7	49	51
8	48	52
9	47	53
10	48	52
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	48	52
17	49	51
18	48	52
19	48	52
20	48	52
21	47	53
22	47	53
23	46	54
24	46	54
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	43	57

	Rain chance (%)
1	38
2	38
3	38
4	38
5	38
6	39
7	39
8	39
9	39
10	39
11	39
12	39
13	39
14	39
15	40
16	40
17	40
18	40
19	40
20	40
21	39
22	39
23	38
24	38
25	38
26	37
27	37
28	37
29	37
30	37

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	1	13	63	23	0
2	1	13	62	24	0
3	1	13	62	24	0
4	1	14	60	25	0
5	1	13	61	25	0
6	0	13	61	26	0
7	0	13	61	26	0
8	0	12	62	26	0
9	0	12	61	27	0
10	0	11	61	28	0
11	0	10	62	28	0
12	0	10	61	29	0
13	0	9	61	30	0
14	0	8	61	31	0
15	0	8	60	32	0
16	0	7	59	34	0
17	0	7	58	35	0
18	0	6	58	36	0
19	0	6	56	38	0
20	0	6	54	40	0
21	0	5	54	41	0
22	0	5	52	43	0
23	0	5	50	45	0
24	0	5	48	47	0
25	0	5	46	49	0
26	0	4	44	52	0
27	0	4	43	53	0
28	0	4	41	55	0
29	0	4	40	56	0
30	0	4	39	56	1

	Avg high (°C)	Avg low (°C)
1	26	17
2	26	17
3	26	17
4	26	17
5	26	17
6	26	17
7	26	17
8	26	17
9	26	17
10	26	17
11	26	17
12	26	17
13	26	17
14	26	18
15	26	18
16	26	18
17	27	18
18	27	18
19	27	18
20	27	18
21	27	18
22	27	18
23	27	18
24	27	18
25	27	18
26	27	18
27	27	18
28	27	18
29	27	18
30	27	18

	Clearer (%)	Cloudier (%)
1	48	52
2	48	52
3	48	52
4	49	51
5	48	52
6	48	52
7	49	51
8	48	52
9	47	53
10	48	52
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	48	52
17	49	51
18	48	52
19	48	52
20	48	52
21	47	53
22	47	53
23	46	54
24	46	54
25	45	55
26	45	55
27	45	55
28	45	55
29	44	56
30	43	57

	Rain chance (%)
1	38
2	38
3	38
4	38
5	38
6	39
7	39
8	39
9	39
10	39
11	39
12	39
13	39
14	39
15	40
16	40
17	40
18	40
19	40
20	40
21	39
22	39
23	38
24	38
25	38
26	37
27	37
28	37
29	37
30	37

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	1	13	63	23	0
2	1	13	62	24	0
3	1	13	62	24	0
4	1	14	60	25	0
5	1	13	61	25	0
6	0	13	61	26	0
7	0	13	61	26	0
8	0	12	62	26	0
9	0	12	61	27	0
10	0	11	61	28	0
11	0	10	62	28	0
12	0	10	61	29	0
13	0	9	61	30	0
14	0	8	61	31	0
15	0	8	60	32	0
16	0	7	59	34	0
17	0	7	58	35	0
18	0	6	58	36	0
19	0	6	56	38	0
20	0	6	54	40	0
21	0	5	54	41	0
22	0	5	52	43	0
23	0	5	50	45	0
24	0	5	48	47	0
25	0	5	46	49	0
26	0	4	44	52	0
27	0	4	43	53	0
28	0	4	41	55	0
29	0	4	40	56	0
30	0	4	39	56	1