Iaçu weather in October

In October, Iaçu sees average daytime highs of 32°C and overnight lows near 21°C, with 21 mm of rain across 4 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 31% of the time in October, and the air most often feels humid.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 30 min by month's end. Set against the rest of the year, October is Iaçu's 1st-clearest and 1st-windiest month. For the whole year in context, see Iaçu's year-round climate.

Daytime high: 32°; 5th warmest
Overnight low: 21°; 6th coldest
Rainfall: 21 mm; 4 wet days
Daylight: 12 h 18 min; 5:17 AM – 5:35 PM
Cloud cover: 55%; 1st clearest
Wind: 11 km/h; 1st windiest
Solar energy: 5.68 kWh/m²
Travel score: 4.7; out of 10

Iaçu is human settlement in Brazil.

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

← September Iaçu year-round climate November →Best places to visit in October

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical October day in Iaçu reaches about 32°C in the afternoon and slips back to 21°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, October runs about 1°C warmer than September and on par with November.

	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	31
Avg high (°C)	31	31	31	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	20	20	20	20	20	20	20	20	20	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21	21

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	32	20
5	32	20
6	32	20
7	32	20
8	32	20
9	32	20
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	32	21
20	32	21
21	32	21
22	32	21
23	32	21
24	32	21
25	32	21
26	32	21
27	32	21
28	32	21
29	32	21
30	32	21
31	32	21

How October really feels in Iaçu

Once humidity and wind are folded in, October averages 31 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Iaçu weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	32° / 22°	56	6.6	12.7	4.0
Feb	33° / 22°	37	6.1	12.4	3.8
Mar	33° / 22°	53	8.1	12.1	3.9
Apr	31° / 22°	37	7.1	11.7	4.5
May	30° / 21°	18	5.1	11.4	5.4
Jun	29° / 19°	14	4.6	11.3	6.2
Jul	28° / 18°	14	4.8	11.3	6.6
Aug	29° / 18°	11	3.7	11.6	6.3
Sep	30° / 19°	11	2.5	11.9	5.6
Oct	32° / 21°	21	4	12.3	4.7
Nov	32° / 22°	53	7.1	12.6	4.3
Dec	32° / 22°	55	6.6	12.7	4.2

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 25% of October, with mostly cloudy or overcast conditions the remaining 44%.

	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	31
Clearer (%)	58	58	58	58	58	58	57	57	58	58	57	58	57	57	57	57	57	57	57	56	56	56	55	55	54	54	54	53	53	52	50
Cloudier (%)	42	42	42	42	42	42	43	43	42	42	43	42	43	43	43	43	43	43	43	44	44	44	45	45	46	46	46	47	47	48	50

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	58	42
6	58	42
7	57	43
8	57	43
9	58	42
10	58	42
11	57	43
12	58	42
13	57	43
14	57	43
15	57	43
16	57	43
17	57	43
18	57	43
19	57	43
20	56	44
21	56	44
22	56	44
23	55	45
24	55	45
25	54	46
26	54	46
27	54	46
28	53	47
29	53	47
30	52	48
31	50	50

Chance of precipitation in October

Any precipitation

Iaçu gets around 21 mm of rain over 4 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 13% and peaks near 17% 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	31
Rain chance (%)	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	14	14	14	15	15	15	16	16	17

	Rain chance (%)
1	11
2	11
3	11
4	12
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	12
13	12
14	12
15	12
16	12
17	12
18	12
19	12
20	13
21	13
22	13
23	14
24	14
25	14
26	15
27	15
28	15
29	16
30	16
31	17

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 47% 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	31
Comfortable (%)	4	4	4	4	3	3	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1
Humid (%)	60	58	57	57	57	57	57	57	57	57	57	57	56	56	55	55	54	53	51	50	48	47	45	44	42	41	40	39	38	36	35
Muggy (%)	36	37	38	38	39	39	39	39	39	40	40	40	41	41	42	42	43	44	45	47	48	49	50	52	54	55	56	57	58	59	60
Oppressive (%)	0	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	3	3	3	3	3	3	3	4	4

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	4	60	36	0
2	4	58	37	1
3	4	57	38	1
4	4	57	38	1
5	3	57	39	1
6	3	57	39	1
7	3	57	39	1
8	3	57	39	1
9	3	57	39	1
10	2	57	40	1
11	2	57	40	1
12	2	57	40	1
13	2	56	41	1
14	2	56	41	1
15	2	55	42	1
16	2	55	42	1
17	2	54	43	1
18	2	53	44	1
19	2	51	45	2
20	2	50	47	2
21	2	48	48	2
22	2	47	49	2
23	2	45	50	3
24	1	44	52	3
25	1	42	54	3
26	1	41	55	3
27	1	40	56	3
28	1	39	57	3
29	1	38	58	3
30	1	36	59	4
31	1	35	60	4

Wind in October

Winds average 11 km/h in October, the windiest month of the year.

Across October, daily wind ranges from about 11 km/h on the calmest days to 11 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	31
Wind speed (km/h)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
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	calm

	Wind speed (km/h)	Feels
1	11	calm
2	11	calm
3	11	calm
4	11	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	calm
31	11	calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over October. Sunrise moves from 5:26 AM to 5:11 AM, and sunset from 5:33 PM to 5:38 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	31
Daylight (h)	12.1	12.1	12.1	12.1	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.4	12.4	12.4	12.4	12.4	12.4	12.4	12.4	12.4	12.5
Sunrise (AM)	5:26	5:26	5:25	5:24	5:24	5:23	5:22	5:22	5:21	5:21	5:20	5:19	5:19	5:18	5:18	5:17	5:17	5:16	5:16	5:15	5:15	5:14	5:14	5:13	5:13	5:13	5:12	5:12	5:11	5:11	5:11
Sunset (PM)	5:33	5:33	5:33	5:33	5:33	5:33	5:34	5:34	5:34	5:34	5:34	5:34	5:34	5:34	5:34	5:35	5:35	5:35	5:35	5:35	5:35	5:36	5:36	5:36	5:36	5:37	5:37	5:37	5:37	5:38	5:38

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	5:26	5:33
2	12.1	5:26	5:33
3	12.1	5:25	5:33
4	12.1	5:24	5:33
5	12.2	5:24	5:33
6	12.2	5:23	5:33
7	12.2	5:22	5:34
8	12.2	5:22	5:34
9	12.2	5:21	5:34
10	12.2	5:21	5:34
11	12.2	5:20	5:34
12	12.2	5:19	5:34
13	12.3	5:19	5:34
14	12.3	5:18	5:34
15	12.3	5:18	5:34
16	12.3	5:17	5:35
17	12.3	5:17	5:35
18	12.3	5:16	5:35
19	12.3	5:16	5:35
20	12.3	5:15	5:35
21	12.3	5:15	5:35
22	12.4	5:14	5:36
23	12.4	5:14	5:36
24	12.4	5:13	5:36
25	12.4	5:13	5:36
26	12.4	5:13	5:37
27	12.4	5:12	5:37
28	12.4	5:12	5:37
29	12.4	5:11	5:37
30	12.4	5:11	5:38
31	12.5	5:11	5:38

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.68 kWh/m².

For context, solar energy here swings from a low near 3.52 kWh/m² to a high of 6.01 kWh/m² in January across the year — October's 5.68 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	31
Solar energy (kWh/m²)	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7
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	Bright

	Solar energy (kWh/m²)	Level
1	5.5	Bright
2	5.5	Bright
3	5.5	Bright
4	5.5	Bright
5	5.5	Bright
6	5.5	Bright
7	5.5	Bright
8	5.5	Bright
9	5.6	Bright
10	5.6	Bright
11	5.6	Bright
12	5.6	Bright
13	5.6	Bright
14	5.6	Bright
15	5.6	Bright
16	5.7	Bright
17	5.7	Bright
18	5.7	Bright
19	5.7	Bright
20	5.7	Bright
21	5.7	Bright
22	5.7	Bright
23	5.7	Bright
24	5.7	Bright
25	5.7	Bright
26	5.7	Bright
27	5.7	Bright
28	5.7	Bright
29	5.7	Bright
30	5.7	Bright
31	5.7	Bright

Planning a trip in October

Is October a good time to visit Iaçu?

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

4.7

Sightseeing

6th-best month of the year

7.4

Beach & pool

6th-best month of the year

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

What to pack for Iaçu in October

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

In October, Iaçu sees daytime highs around 32°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in Iaçu in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Iaçu peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 9 (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	14	12	9	9	9	10	11	13	13	12
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

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

Location & terrain

Where is Iaçu?

Iaçu sits at 12.8°S, 40.2°W, 240 m above sea level, in Brazil. The nearest listed city is Itaberaba, 29 km away.

Topography around Iaçu

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

Within 3 km, the terrain around Iaçu has only modest variations in elevation — a maximum elevation change of 228 m around an average of 251 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 598 m; within 80 km, large variations in elevation — a maximum elevation change of 928 m.

The land around Iaçu is covered by grassland (61%) within 3 km, grassland (67%) within 16 km, and grassland (58%) and trees (27%) within 80 km.

3 km

228 m

grassland 61%

16 km

598 m

grassland 67%

80 km

928 m

grassland 58%

treesshrubsgrasslandcroplandartificial surfaceswater

← September Iaçu year-round climate November →Best places to visit in October

October weather nearby: Itaberaba 29 km · Boa Vista do Tupim 44 km · Itatim 56 km · Ruy Barbosa 62 km · Amargosa 72 km · Maracás 79 km · Ubaíra 81 km · Castro Alves 85 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 Iaçu (-12.7672°, -40.2117°, elevation 240 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	31	20
2	31	20
3	31	20
4	32	20
5	32	20
6	32	20
7	32	20
8	32	20
9	32	20
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	32	21
20	32	21
21	32	21
22	32	21
23	32	21
24	32	21
25	32	21
26	32	21
27	32	21
28	32	21
29	32	21
30	32	21
31	32	21

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	58	42
6	58	42
7	57	43
8	57	43
9	58	42
10	58	42
11	57	43
12	58	42
13	57	43
14	57	43
15	57	43
16	57	43
17	57	43
18	57	43
19	57	43
20	56	44
21	56	44
22	56	44
23	55	45
24	55	45
25	54	46
26	54	46
27	54	46
28	53	47
29	53	47
30	52	48
31	50	50

	Rain chance (%)
1	11
2	11
3	11
4	12
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	12
13	12
14	12
15	12
16	12
17	12
18	12
19	12
20	13
21	13
22	13
23	14
24	14
25	14
26	15
27	15
28	15
29	16
30	16
31	17

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	4	60	36	0
2	4	58	37	1
3	4	57	38	1
4	4	57	38	1
5	3	57	39	1
6	3	57	39	1
7	3	57	39	1
8	3	57	39	1
9	3	57	39	1
10	2	57	40	1
11	2	57	40	1
12	2	57	40	1
13	2	56	41	1
14	2	56	41	1
15	2	55	42	1
16	2	55	42	1
17	2	54	43	1
18	2	53	44	1
19	2	51	45	2
20	2	50	47	2
21	2	48	48	2
22	2	47	49	2
23	2	45	50	3
24	1	44	52	3
25	1	42	54	3
26	1	41	55	3
27	1	40	56	3
28	1	39	57	3
29	1	38	58	3
30	1	36	59	4
31	1	35	60	4

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	32	20
5	32	20
6	32	20
7	32	20
8	32	20
9	32	20
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	32	21
20	32	21
21	32	21
22	32	21
23	32	21
24	32	21
25	32	21
26	32	21
27	32	21
28	32	21
29	32	21
30	32	21
31	32	21

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	58	42
6	58	42
7	57	43
8	57	43
9	58	42
10	58	42
11	57	43
12	58	42
13	57	43
14	57	43
15	57	43
16	57	43
17	57	43
18	57	43
19	57	43
20	56	44
21	56	44
22	56	44
23	55	45
24	55	45
25	54	46
26	54	46
27	54	46
28	53	47
29	53	47
30	52	48
31	50	50

	Rain chance (%)
1	11
2	11
3	11
4	12
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	12
13	12
14	12
15	12
16	12
17	12
18	12
19	12
20	13
21	13
22	13
23	14
24	14
25	14
26	15
27	15
28	15
29	16
30	16
31	17

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	4	60	36	0
2	4	58	37	1
3	4	57	38	1
4	4	57	38	1
5	3	57	39	1
6	3	57	39	1
7	3	57	39	1
8	3	57	39	1
9	3	57	39	1
10	2	57	40	1
11	2	57	40	1
12	2	57	40	1
13	2	56	41	1
14	2	56	41	1
15	2	55	42	1
16	2	55	42	1
17	2	54	43	1
18	2	53	44	1
19	2	51	45	2
20	2	50	47	2
21	2	48	48	2
22	2	47	49	2
23	2	45	50	3
24	1	44	52	3
25	1	42	54	3
26	1	41	55	3
27	1	40	56	3
28	1	39	57	3
29	1	38	58	3
30	1	36	59	4
31	1	35	60	4

	Avg high (°C)	Avg low (°C)
1	31	20
2	31	20
3	31	20
4	32	20
5	32	20
6	32	20
7	32	20
8	32	20
9	32	20
10	32	21
11	32	21
12	32	21
13	32	21
14	32	21
15	32	21
16	32	21
17	32	21
18	32	21
19	32	21
20	32	21
21	32	21
22	32	21
23	32	21
24	32	21
25	32	21
26	32	21
27	32	21
28	32	21
29	32	21
30	32	21
31	32	21

	Clearer (%)	Cloudier (%)
1	58	42
2	58	42
3	58	42
4	58	42
5	58	42
6	58	42
7	57	43
8	57	43
9	58	42
10	58	42
11	57	43
12	58	42
13	57	43
14	57	43
15	57	43
16	57	43
17	57	43
18	57	43
19	57	43
20	56	44
21	56	44
22	56	44
23	55	45
24	55	45
25	54	46
26	54	46
27	54	46
28	53	47
29	53	47
30	52	48
31	50	50

	Rain chance (%)
1	11
2	11
3	11
4	12
5	12
6	12
7	12
8	12
9	12
10	12
11	12
12	12
13	12
14	12
15	12
16	12
17	12
18	12
19	12
20	13
21	13
22	13
23	14
24	14
25	14
26	15
27	15
28	15
29	16
30	16
31	17

	Comfortable (%)	Humid (%)	Muggy (%)	Oppressive (%)
1	4	60	36	0
2	4	58	37	1
3	4	57	38	1
4	4	57	38	1
5	3	57	39	1
6	3	57	39	1
7	3	57	39	1
8	3	57	39	1
9	3	57	39	1
10	2	57	40	1
11	2	57	40	1
12	2	57	40	1
13	2	56	41	1
14	2	56	41	1
15	2	55	42	1
16	2	55	42	1
17	2	54	43	1
18	2	53	44	1
19	2	51	45	2
20	2	50	47	2
21	2	48	48	2
22	2	47	49	2
23	2	45	50	3
24	1	44	52	3
25	1	42	54	3
26	1	41	55	3
27	1	40	56	3
28	1	39	57	3
29	1	38	58	3
30	1	36	59	4
31	1	35	60	4