Aracaju weather in September

In September, Aracaju sees average daytime highs of 25°C and overnight lows near 24°C, with 67 mm of rain across 17.4 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 68% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Aracaju's 1st-clearest and 4th-windiest month. For the whole year in context, see Aracaju's year-round climate.

Daytime high: 25°; 10th warmest
Overnight low: 24°; 3rd coldest
Rainfall: 67 mm; 17.4 wet days
Daylight: 11 h 54 min; 5:24 AM – 5:21 PM
Cloud cover: 34%; 1st clearest
Wind: 21 km/h; 4th windiest
Solar energy: 5.72 kWh/m²
Travel score: 6.0; out of 10

Aracaju is human settlement in Brazil.

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

← August Aracaju 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 25°C through the month.

A typical September day in Aracaju reaches about 25°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 26°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)	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	26	26
Avg low (°C)	23	23	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

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

Aracaju weather by month

How September compares with the rest of the year at a glance. September is the 10th-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	27° / 25°	52	14.1	12.6	6.2
Feb	27° / 26°	64	16.1	12.4	5.6
Mar	27° / 26°	77	17.9	12.1	5.6
Apr	27° / 26°	131	20.3	11.8	5.1
May	27° / 25°	186	23.5	11.5	4.8
Jun	26° / 24°	167	24.1	11.4	4.8
Jul	25° / 24°	138	24.1	11.4	5.0
Aug	25° / 23°	103	22.4	11.6	5.3
Sep	25° / 24°	67	17.4	11.9	6.0
Oct	26° / 24°	60	14.1	12.2	6.5
Nov	26° / 25°	41	11.1	12.5	6.8
Dec	27° / 25°	30	9.2	12.6	6.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 68% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to open up as the month goes on.

	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 (%)	88	88	88	88	89	89	89	89	89	90	90	90	90	91	91	92	92	92	92	92	92	92	92	92	92	92	91	91	91	90
Cloudier (%)	12	12	12	12	11	11	11	11	11	10	10	10	10	9	9	8	8	8	8	8	8	8	8	8	8	8	9	9	9	10

	Clearer (%)	Cloudier (%)
1	88	12
2	88	12
3	88	12
4	88	12
5	89	11
6	89	11
7	89	11
8	89	11
9	89	11
10	90	10
11	90	10
12	90	10
13	90	10
14	91	9
15	91	9
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	90	10

Chance of precipitation in September

Any precipitation

Aracaju gets around 67 mm of rain over 17.4 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 58% and peaks near 65% on the wettest days. The odds ease toward the end of the month.

	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 (%)	65	65	65	65	64	64	64	64	64	63	63	63	62	62	61	60	59	58	57	56	55	54	53	52	51	50	49	49	48	48

	Rain chance (%)
1	65
2	65
3	65
4	65
5	64
6	64
7	64
8	64
9	64
10	63
11	63
12	63
13	62
14	62
15	61
16	60
17	59
18	58
19	57
20	56
21	55
22	54
23	53
24	52
25	51
26	50
27	49
28	49
29	48
30	48

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 97% 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
Humid (%)	6	6	6	6	6	6	5	5	5	4	4	3	3	3	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1
Muggy (%)	77	76	76	75	75	75	75	75	74	75	74	75	74	74	74	74	73	72	72	70	69	67	66	64	63	61	60	58	57	56
Oppressive (%)	17	18	18	19	19	19	20	20	21	21	22	22	23	23	24	24	25	26	27	29	30	32	33	35	36	38	39	41	42	43

	Humid (%)	Muggy (%)	Oppressive (%)
1	6	77	17
2	6	76	18
3	6	76	18
4	6	75	19
5	6	75	19
6	6	75	19
7	5	75	20
8	5	75	20
9	5	74	21
10	4	75	21
11	4	74	22
12	3	75	22
13	3	74	23
14	3	74	23
15	2	74	24
16	2	74	24
17	2	73	25
18	2	72	26
19	1	72	27
20	1	70	29
21	1	69	30
22	1	67	32
23	1	66	33
24	1	64	35
25	1	63	36
26	1	61	38
27	1	60	39
28	1	58	41
29	1	57	42
30	1	56	43

Wind in September

Winds average 21 km/h in September.

Across September, daily wind ranges from about 20 km/h on the calmest days to 21 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)	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	21	21	21	21	21
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	20	breezy
2	20	breezy
3	20	breezy
4	21	breezy
5	21	breezy
6	21	breezy
7	21	breezy
8	21	breezy
9	21	breezy
10	21	breezy
11	21	breezy
12	21	breezy
13	21	breezy
14	21	breezy
15	21	breezy
16	21	breezy
17	21	breezy
18	21	breezy
19	21	breezy
20	21	breezy
21	21	breezy
22	21	breezy
23	21	breezy
24	21	breezy
25	21	breezy
26	21	breezy
27	21	breezy
28	21	breezy
29	21	breezy
30	21	breezy

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 5:34 AM to 5:15 AM, and sunset from 5:22 PM to 5:20 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)	11.8	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	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1
Sunrise (AM)	5:34	5:34	5:33	5:32	5:32	5:31	5:30	5:30	5:29	5:28	5:28	5:27	5:26	5:26	5:25	5:24	5:24	5:23	5:22	5:22	5:21	5:20	5:20	5:19	5:18	5:18	5:17	5:16	5:16	5:15
Sunset (PM)	5:22	5:22	5:22	5:22	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:21	5:20	5:20	5:20	5:20	5:20	5:20	5:20	5:20	5:20

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.8	5:34	5:22
2	11.8	5:34	5:22
3	11.8	5:33	5:22
4	11.8	5:32	5:22
5	11.8	5:32	5:21
6	11.8	5:31	5:21
7	11.8	5:30	5:21
8	11.9	5:30	5:21
9	11.9	5:29	5:21
10	11.9	5:28	5:21
11	11.9	5:28	5:21
12	11.9	5:27	5:21
13	11.9	5:26	5:21
14	11.9	5:26	5:21
15	11.9	5:25	5:21
16	11.9	5:24	5:21
17	12.0	5:24	5:21
18	12.0	5:23	5:21
19	12.0	5:22	5:21
20	12.0	5:22	5:21
21	12.0	5:21	5:21
22	12.0	5:20	5:20
23	12.0	5:20	5:20
24	12.0	5:19	5:20
25	12.0	5:18	5:20
26	12.0	5:18	5:20
27	12.1	5:17	5:20
28	12.1	5:16	5:20
29	12.1	5:16	5:20
30	12.1	5:15	5:20

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.72 kWh/m².

For context, solar energy here swings from a low near 4.17 kWh/m² to a high of 6.64 kWh/m² in December across the year — September's 5.72 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)	5.3	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.5	5.5	5.6	5.6	5.6	5.7	5.7	5.7	5.8	5.8	5.8	5.8	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.1	6.1	6.1
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	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	5.3	Bright
2	5.4	Bright
3	5.4	Bright
4	5.4	Bright
5	5.4	Bright
6	5.5	Bright
7	5.5	Bright
8	5.5	Bright
9	5.5	Bright
10	5.5	Bright
11	5.6	Bright
12	5.6	Bright
13	5.6	Bright
14	5.7	Bright
15	5.7	Bright
16	5.7	Bright
17	5.8	Bright
18	5.8	Bright
19	5.8	Bright
20	5.8	Bright
21	5.9	Bright
22	5.9	Bright
23	5.9	Bright
24	6.0	Bright
25	6.0	Intense
26	6.0	Intense
27	6.0	Intense
28	6.1	Intense
29	6.1	Intense
30	6.1	Intense

Planning a trip in September

Hazard calendar for Aracaju

In seasonPeak

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

Aracaju's rainy season runs April–August, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Aracaju?

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

6.0

Sightseeing

5th-best month of the year

5.5

Beach & pool

7th-best month of the year

September is a reasonable time to visit Aracaju for sightseeing.

What to pack for Aracaju in September

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

In September, Aracaju sees daytime highs around 25°C and nights near 24°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 17 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Aracaju in September

The nearest coast averages about 26°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 22 km away) is warmest in April at about 28°C and coldest in August near 26°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)	27	28	28	28	28	27	26	26	26	26	26	27
Comfort	Warm	Warm	Tropical	Tropical	Warm	Warm	Warm	Warm	Warm	Warm	Warm	Warm

	Sea temperature (°C)	Comfort
Jan	27	Warm
Feb	28	Warm
Mar	28	Tropical
Apr	28	Tropical
May	28	Warm
Jun	27	Warm
Jul	26	Warm
Aug	26	Warm
Sep	26	Warm
Oct	26	Warm
Nov	26	Warm
Dec	27	Warm

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

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

Location & terrain

Where is Aracaju?

Aracaju sits at 10.9°S, 37.1°W, 11 m above sea level, in Brazil. The nearest listed city is Barra dos Coqueiros, 4.0 km away.

Topography around Aracaju

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

Within 3 km, the terrain around Aracaju has only modest variations in elevation — a maximum elevation change of 69 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 163 m; within 80 km, large variations in elevation — a maximum elevation change of 694 m.

The land around Aracaju is covered by artificial surfaces (77%) within 3 km, water (30%), grassland (26%) and trees (20%) within 16 km, and grassland (44%) and water (30%) within 80 km.

3 km

69 m

artificial surfaces 77%

16 km

163 m

water 30%

80 km

694 m

grassland 44%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves

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

September weather nearby: Barra dos Coqueiros 4.0 km · Nossa Senhora do Socorro 9.0 km · Laranjeiras 16 km · São Cristóvão 19 km · Maruim 19 km · Itaporanga d'Ajuda 28 km · Areia Branca 32 km · Japaratuba 38 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 Aracaju (-10.9111°, -37.0717°, elevation 11 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	25	23
2	25	23
3	25	24
4	25	24
5	25	24
6	25	24
7	25	24
8	25	24
9	25	24
10	25	24
11	25	24
12	25	24
13	25	24
14	25	24
15	25	24
16	25	24
17	25	24
18	25	24
19	25	24
20	25	24
21	25	24
22	25	24
23	25	24
24	25	24
25	25	24
26	25	24
27	25	24
28	25	24
29	26	24
30	26	24

	Clearer (%)	Cloudier (%)
1	88	12
2	88	12
3	88	12
4	88	12
5	89	11
6	89	11
7	89	11
8	89	11
9	89	11
10	90	10
11	90	10
12	90	10
13	90	10
14	91	9
15	91	9
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	90	10

	Rain chance (%)
1	65
2	65
3	65
4	65
5	64
6	64
7	64
8	64
9	64
10	63
11	63
12	63
13	62
14	62
15	61
16	60
17	59
18	58
19	57
20	56
21	55
22	54
23	53
24	52
25	51
26	50
27	49
28	49
29	48
30	48

	Humid (%)	Muggy (%)	Oppressive (%)
1	6	77	17
2	6	76	18
3	6	76	18
4	6	75	19
5	6	75	19
6	6	75	19
7	5	75	20
8	5	75	20
9	5	74	21
10	4	75	21
11	4	74	22
12	3	75	22
13	3	74	23
14	3	74	23
15	2	74	24
16	2	74	24
17	2	73	25
18	2	72	26
19	1	72	27
20	1	70	29
21	1	69	30
22	1	67	32
23	1	66	33
24	1	64	35
25	1	63	36
26	1	61	38
27	1	60	39
28	1	58	41
29	1	57	42
30	1	56	43

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

	Clearer (%)	Cloudier (%)
1	88	12
2	88	12
3	88	12
4	88	12
5	89	11
6	89	11
7	89	11
8	89	11
9	89	11
10	90	10
11	90	10
12	90	10
13	90	10
14	91	9
15	91	9
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	90	10

	Rain chance (%)
1	65
2	65
3	65
4	65
5	64
6	64
7	64
8	64
9	64
10	63
11	63
12	63
13	62
14	62
15	61
16	60
17	59
18	58
19	57
20	56
21	55
22	54
23	53
24	52
25	51
26	50
27	49
28	49
29	48
30	48

	Humid (%)	Muggy (%)	Oppressive (%)
1	6	77	17
2	6	76	18
3	6	76	18
4	6	75	19
5	6	75	19
6	6	75	19
7	5	75	20
8	5	75	20
9	5	74	21
10	4	75	21
11	4	74	22
12	3	75	22
13	3	74	23
14	3	74	23
15	2	74	24
16	2	74	24
17	2	73	25
18	2	72	26
19	1	72	27
20	1	70	29
21	1	69	30
22	1	67	32
23	1	66	33
24	1	64	35
25	1	63	36
26	1	61	38
27	1	60	39
28	1	58	41
29	1	57	42
30	1	56	43

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

	Clearer (%)	Cloudier (%)
1	88	12
2	88	12
3	88	12
4	88	12
5	89	11
6	89	11
7	89	11
8	89	11
9	89	11
10	90	10
11	90	10
12	90	10
13	90	10
14	91	9
15	91	9
16	92	8
17	92	8
18	92	8
19	92	8
20	92	8
21	92	8
22	92	8
23	92	8
24	92	8
25	92	8
26	92	8
27	91	9
28	91	9
29	91	9
30	90	10

	Rain chance (%)
1	65
2	65
3	65
4	65
5	64
6	64
7	64
8	64
9	64
10	63
11	63
12	63
13	62
14	62
15	61
16	60
17	59
18	58
19	57
20	56
21	55
22	54
23	53
24	52
25	51
26	50
27	49
28	49
29	48
30	48

	Humid (%)	Muggy (%)	Oppressive (%)
1	6	77	17
2	6	76	18
3	6	76	18
4	6	75	19
5	6	75	19
6	6	75	19
7	5	75	20
8	5	75	20
9	5	74	21
10	4	75	21
11	4	74	22
12	3	75	22
13	3	74	23
14	3	74	23
15	2	74	24
16	2	74	24
17	2	73	25
18	2	72	26
19	1	72	27
20	1	70	29
21	1	69	30
22	1	67	32
23	1	66	33
24	1	64	35
25	1	63	36
26	1	61	38
27	1	60	39
28	1	58	41
29	1	57	42
30	1	56	43