Acaraú weather in September

In September, Acaraú sees average daytime highs of 32°C and overnight lows near 25°C, with 2 mm of rain across 0.3 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-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 87% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Acaraú's 1st-clearest and 1st-windiest month. For the whole year in context, see Acaraú's year-round climate.

Daytime high: 32°; 1st warmest
Overnight low: 25°; 8th coldest
Rainfall: 2 mm; 0.3 wet days
Daylight: 12 hours; 5:35 AM – 5:34 PM
Cloud cover: 21%; 1st clearest
Wind: 23 km/h; 1st windiest
Solar energy: 6.8 kWh/m²
Travel score: 5.1; out of 10

Acaraú is human settlement in Brazil.

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

← August Acaraú 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 32°C through the month.

A typical September day in Acaraú reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 33°C. Set against its neighbours, September runs on par with August and on par with 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)	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	32	32
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25

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

How September really feels in Acaraú

Once humidity and wind are folded in, September averages 30 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 September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Acaraú weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	31° / 25°	103	18	12.1	3.7
Feb	30° / 25°	149	22.2	12.1	3.3
Mar	30° / 24°	227	27.1	12	3.1
Apr	30° / 24°	271	25.9	11.9	3.1
May	30° / 25°	118	18.4	11.9	4.0
Jun	31° / 24°	34	7.7	11.8	5.1
Jul	31° / 24°	17	3.5	11.8	5.2
Aug	32° / 24°	3	0.5	11.9	5.1
Sep	32° / 25°	2	0.3	12	5.1
Oct	32° / 25°	3	0.6	12.1	5.1
Nov	32° / 25°	5	1.2	12.1	4.9
Dec	32° / 25°	23	6.6	12.2	4.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 87% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 4%.

	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 (%)	95	95	95	95	95	95	95	95	95	95	95	96	97	97	97	97	97	97	97	97	97	97	97	97	97	97	96	95	95	95
Cloudier (%)	5	5	5	5	5	5	5	5	5	5	5	4	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	5	5	5

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	96	4
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	96	4
28	95	5
29	95	5
30	95	5

Chance of precipitation in September

Any precipitation

Acaraú gets around 2 mm of rain over 0.3 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 2% 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 (%)	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	1

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	2
19	2
20	2
21	2
22	2
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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
Muggy (%)	54	55	55	56	56	57	57	56	56	55	54	53	51	50	49	47	46	45	43	42	41	40	39	38	38	37	36	36	35	35
Oppressive (%)	46	45	45	44	44	43	43	44	44	45	46	47	49	50	51	53	54	55	57	58	59	60	61	62	62	63	64	64	65	65

	Muggy (%)	Oppressive (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	56	44
6	57	43
7	57	43
8	56	44
9	56	44
10	55	45
11	54	46
12	53	47
13	51	49
14	50	50
15	49	51
16	47	53
17	46	54
18	45	55
19	43	57
20	42	58
21	41	59
22	40	60
23	39	61
24	38	62
25	38	62
26	37	63
27	36	64
28	36	64
29	35	65
30	35	65

Wind in September

Winds average 23 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 22 km/h on the calmest days to 23 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)	22	22	22	22	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:42 AM to 5:29 AM, and sunset from 5:39 PM to 5:30 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)	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0
Sunrise (AM)	5:42	5:41	5:41	5:41	5:40	5:40	5:39	5:39	5:38	5:38	5:38	5:37	5:37	5:36	5:36	5:35	5:35	5:34	5:34	5:33	5:33	5:33	5:32	5:32	5:31	5:31	5:30	5:30	5:30	5:29
Sunset (PM)	5:39	5:38	5:38	5:38	5:37	5:37	5:37	5:37	5:36	5:36	5:36	5:35	5:35	5:35	5:35	5:34	5:34	5:34	5:33	5:33	5:33	5:33	5:32	5:32	5:32	5:31	5:31	5:31	5:31	5:30

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

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.8 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.67 kWh/m² to a high of 6.8 kWh/m² in September across the year — September's 6.8 kWh/m² sits near the top of that range.

	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)	6.6	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.9
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.6	Intense
2	6.7	Intense
3	6.7	Intense
4	6.7	Intense
5	6.7	Intense
6	6.7	Intense
7	6.7	Intense
8	6.7	Intense
9	6.8	Intense
10	6.8	Intense
11	6.8	Intense
12	6.8	Intense
13	6.8	Intense
14	6.8	Intense
15	6.8	Intense
16	6.8	Intense
17	6.8	Intense
18	6.8	Intense
19	6.8	Intense
20	6.8	Intense
21	6.8	Intense
22	6.8	Intense
23	6.8	Intense
24	6.8	Intense
25	6.8	Intense
26	6.8	Intense
27	6.8	Intense
28	6.8	Intense
29	6.8	Intense
30	6.9	Intense

Planning a trip in September

Hazard calendar for Acaraú

In seasonPeak

None of Acaraú's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Acaraú's monsoon runs February–April, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Acaraú?

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

5.1

Sightseeing

2nd-best month of the year

8.5

Beach & pool

1st-best month of the year

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

What to pack for Acaraú in September

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

In September, Acaraú sees daytime highs around 32°C and nights near 25°C. Pack light clothes and sun protection. Worth having: a windbreaker.

light clothessun protectiona windbreaker

Sea temperature near Acaraú in September

The nearest coast averages about 27°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 27 km away) is warmest in April at about 29°C and coldest in August near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	28	28	29	29	29	28	27	27	27	27	28	28
Comfort	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Warm	Warm	Warm	Warm	Warm	Tropical

	Sea temperature (°C)	Comfort
Jan	28	Tropical
Feb	28	Tropical
Mar	29	Tropical
Apr	29	Tropical
May	29	Tropical
Jun	28	Tropical
Jul	27	Warm
Aug	27	Warm
Sep	27	Warm
Oct	27	Warm
Nov	28	Warm
Dec	28	Tropical

UV index in Acaraú in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Acaraú peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (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)	13	14	16	14	12	10	10	10	12	12	12	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	14	Extreme
Mar	16	Extreme
Apr	14	Extreme
May	12	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	10	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	12	Extreme
Dec	11	Extreme

Location & terrain

Where is Acaraú?

Acaraú sits at 2.9°S, 40.1°W, 17 m above sea level, in Brazil. The nearest listed city is Bela Cruz, 19 km away.

Topography around Acaraú

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

Within 3 km, the terrain around Acaraú has only modest variations in elevation — a maximum elevation change of 25 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 50 m; within 80 km, large variations in elevation — a maximum elevation change of 883 m.

The land around Acaraú is covered by grassland (44%) and trees (21%) within 3 km, grassland (33%), water (28%) and trees (21%) within 16 km, and water (37%), shrubs (23%) and trees (20%) within 80 km.

3 km

25 m

grassland 44%

16 km

50 m

grassland 33%

80 km

883 m

water 37%

treesshrubsgrasslandartificial surfacesbare terrainwaterwetlandmangroves

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

September weather nearby: Bela Cruz 19 km · Itarema 23 km · Marco 27 km · Jijoca de Jericoacoara 37 km · Morrinhos 38 km · Amontada 62 km · Santana do Acaraú 65 km · Massapê 75 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 Acaraú (-2.8856°, -40.12°, elevation 17 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. 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	32	25
2	32	25
3	32	25
4	32	25
5	32	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	96	4
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	96	4
28	95	5
29	95	5
30	95	5

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	2
19	2
20	2
21	2
22	2
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1

	Muggy (%)	Oppressive (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	56	44
6	57	43
7	57	43
8	56	44
9	56	44
10	55	45
11	54	46
12	53	47
13	51	49
14	50	50
15	49	51
16	47	53
17	46	54
18	45	55
19	43	57
20	42	58
21	41	59
22	40	60
23	39	61
24	38	62
25	38	62
26	37	63
27	36	64
28	36	64
29	35	65
30	35	65

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

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	96	4
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	96	4
28	95	5
29	95	5
30	95	5

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	2
19	2
20	2
21	2
22	2
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1

	Muggy (%)	Oppressive (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	56	44
6	57	43
7	57	43
8	56	44
9	56	44
10	55	45
11	54	46
12	53	47
13	51	49
14	50	50
15	49	51
16	47	53
17	46	54
18	45	55
19	43	57
20	42	58
21	41	59
22	40	60
23	39	61
24	38	62
25	38	62
26	37	63
27	36	64
28	36	64
29	35	65
30	35	65

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

	Clearer (%)	Cloudier (%)
1	95	5
2	95	5
3	95	5
4	95	5
5	95	5
6	95	5
7	95	5
8	95	5
9	95	5
10	95	5
11	95	5
12	96	4
13	97	3
14	97	3
15	97	3
16	97	3
17	97	3
18	97	3
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	96	4
28	95	5
29	95	5
30	95	5

	Rain chance (%)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	1
12	1
13	2
14	2
15	2
16	2
17	2
18	2
19	2
20	2
21	2
22	2
23	1
24	1
25	1
26	1
27	1
28	1
29	1
30	1

	Muggy (%)	Oppressive (%)
1	54	46
2	55	45
3	55	45
4	56	44
5	56	44
6	57	43
7	57	43
8	56	44
9	56	44
10	55	45
11	54	46
12	53	47
13	51	49
14	50	50
15	49	51
16	47	53
17	46	54
18	45	55
19	43	57
20	42	58
21	41	59
22	40	60
23	39	61
24	38	62
25	38	62
26	37	63
27	36	64
28	36	64
29	35	65
30	35	65