Brejo weather in September

In September, Brejo sees average daytime highs of 36°C and overnight lows near 24°C, with 2 mm of rain across 0.5 wet days and about 12 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 36°C through the month. The sky is clear or mostly clear about 75% of the time in September, and the air most often feels muggy.

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 Brejo's 1st-clearest and 3rd-windiest month. For the whole year in context, see Brejo's year-round climate.

Daytime high: 36°; 3rd warmest
Overnight low: 24°; 8th coldest
Rainfall: 2 mm; 0.5 wet days
Daylight: 12 hours; 5:46 AM – 5:45 PM
Cloud cover: 32%; 1st clearest
Wind: 11 km/h; 3rd windiest
Solar energy: 6.59 kWh/m²
Travel score: 2.4; out of 10

Brejo is human settlement in Brazil.

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

← August Brejo 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 36°C through the month.

A typical September day in Brejo reaches about 36°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 35°C and 38°C. Set against its neighbours, September runs about 1°C warmer than 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)	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	36	37	37	37	37	37	37	37	37	37	37	37	37
Avg low (°C)	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	24	24

	Avg high (°C)	Avg low (°C)
1	36	24
2	36	24
3	36	24
4	36	24
5	36	24
6	36	24
7	36	24
8	36	24
9	36	24
10	36	24
11	36	24
12	36	24
13	36	24
14	36	24
15	36	24
16	36	24
17	36	24
18	36	24
19	37	24
20	37	24
21	37	24
22	37	24
23	37	24
24	37	24
25	37	24
26	37	24
27	37	24
28	37	24
29	37	24
30	37	24

How September really feels in Brejo

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

17 feel dangerously hot (≥ 39°C)

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.

Brejo weather by month

How September compares with the rest of the year at a glance. September is the 3rd-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	33° / 24°	177	19.7	12.2	2.6
Feb	32° / 24°	236	21.6	12.1	2.7
Mar	31° / 24°	277	26.3	12	2.6
Apr	31° / 24°	303	24.9	11.9	2.7
May	32° / 24°	161	17	11.8	3.5
Jun	32° / 23°	36	6.9	11.8	4.2
Jul	33° / 23°	17	3	11.8	4.1
Aug	35° / 23°	3	0.7	11.9	3.3
Sep	36° / 24°	2	0.5	12	2.4
Oct	37° / 25°	8	1.3	12.1	1.9
Nov	37° / 25°	20	3.1	12.2	1.9
Dec	36° / 25°	57	7.7	12.2	2.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 75% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 7%.

	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 (%)	94	94	94	94	94	94	94	94	94	94	93	93	93	93	93	92	92	92	92	91	91	91	91	91	91	92	92	91	91	91
Cloudier (%)	6	6	6	6	6	6	6	6	6	6	7	7	7	7	7	8	8	8	8	9	9	9	9	9	9	8	8	9	9	9

	Clearer (%)	Cloudier (%)
1	94	6
2	94	6
3	94	6
4	94	6
5	94	6
6	94	6
7	94	6
8	94	6
9	94	6
10	94	6
11	93	7
12	93	7
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	92	8
19	92	8
20	91	9
21	91	9
22	91	9
23	91	9
24	91	9
25	91	9
26	92	8
27	92	8
28	91	9
29	91	9
30	91	9

Chance of precipitation in September

Any precipitation

Brejo gets around 2 mm of rain over 0.5 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 2% and peaks near 3% 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 (%)	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3

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

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 80% of days. Sticky, muggy-or-worse air turns up on roughly 92% 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 (%)	8	8	8	9	9	9	9	9	9	9	9	9	9	8	8	8	8	7	7	7	7	7	6	6	6	6	6	6	6	6
Muggy (%)	74	75	76	76	77	77	78	78	79	79	79	80	80	81	81	81	81	82	82	82	82	82	83	83	83	83	83	83	83	84
Oppressive (%)	18	17	16	15	14	14	13	13	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	10

	Humid (%)	Muggy (%)	Oppressive (%)
1	8	74	18
2	8	75	17
3	8	76	16
4	9	76	15
5	9	77	14
6	9	77	14
7	9	78	13
8	9	78	13
9	9	79	12
10	9	79	12
11	9	79	12
12	9	80	11
13	9	80	11
14	8	81	11
15	8	81	11
16	8	81	11
17	8	81	11
18	7	82	11
19	7	82	11
20	7	82	11
21	7	82	11
22	7	82	11
23	6	83	11
24	6	83	11
25	6	83	11
26	6	83	11
27	6	83	11
28	6	83	11
29	6	83	11
30	6	84	10

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 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)	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12
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	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	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	calm
25	12	calm
26	12	calm
27	12	calm
28	12	calm
29	12	calm
30	12	calm

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 5:53 AM to 5:39 AM, and sunset from 5:49 PM to 5:41 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	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	12.0	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)	5:53	5:52	5:52	5:52	5:51	5:51	5:50	5:50	5:49	5:49	5:48	5:48	5:47	5:47	5:46	5:46	5:45	5:45	5:44	5:44	5:44	5:43	5:43	5:42	5:42	5:41	5:41	5:40	5:40	5:39
Sunset (PM)	5:49	5:48	5:48	5:48	5:48	5:47	5:47	5:47	5:47	5:46	5:46	5:46	5:46	5:45	5:45	5:45	5:44	5:44	5:44	5:44	5:43	5:43	5:43	5:43	5:42	5:42	5:42	5:42	5:41	5:41

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	5:53	5:49
2	11.9	5:52	5:48
3	11.9	5:52	5:48
4	11.9	5:52	5:48
5	11.9	5:51	5:48
6	11.9	5:51	5:47
7	11.9	5:50	5:47
8	12.0	5:50	5:47
9	12.0	5:49	5:47
10	12.0	5:49	5:46
11	12.0	5:48	5:46
12	12.0	5:48	5:46
13	12.0	5:47	5:46
14	12.0	5:47	5:45
15	12.0	5:46	5:45
16	12.0	5:46	5:45
17	12.0	5:45	5:44
18	12.0	5:45	5:44
19	12.0	5:44	5:44
20	12.0	5:44	5:44
21	12.0	5:44	5:43
22	12.0	5:43	5:43
23	12.0	5:43	5:43
24	12.0	5:42	5:43
25	12.0	5:42	5:42
26	12.0	5:41	5:42
27	12.0	5:41	5:42
28	12.0	5:40	5:42
29	12.0	5:40	5:41
30	12.0	5:39	5:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.59 kWh/m².

For context, solar energy here swings from a low near 4.74 kWh/m² to a high of 6.74 kWh/m² in October across the year — September's 6.59 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)	6.4	6.4	6.4	6.4	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7	6.7
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	6.4	Intense
2	6.4	Intense
3	6.4	Intense
4	6.4	Intense
5	6.5	Intense
6	6.5	Intense
7	6.5	Intense
8	6.5	Intense
9	6.5	Intense
10	6.5	Intense
11	6.5	Intense
12	6.5	Intense
13	6.6	Intense
14	6.6	Intense
15	6.6	Intense
16	6.6	Intense
17	6.6	Intense
18	6.6	Intense
19	6.6	Intense
20	6.6	Intense
21	6.7	Intense
22	6.7	Intense
23	6.7	Intense
24	6.7	Intense
25	6.7	Intense
26	6.7	Intense
27	6.7	Intense
28	6.7	Intense
29	6.7	Intense
30	6.7	Intense

Planning a trip in September

Hazard calendar for Brejo

In seasonPeak

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

Brejo's monsoon runs January–May, 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 Brejo?

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

2.4

Sightseeing

9th-best month of the year

5.9

Beach & pool

4th-best month of the year

September is a weaker month for outdoor sightseeing in Brejo.

What to pack for Brejo in September

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

In September, Brejo sees daytime highs around 36°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Brejo 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 Brejo peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (extreme).

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	15	14	11	10	10	10	12	11	11	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

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

Air quality in Brejo 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 Brejo is worst in November — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	15	14	12	9	9	12	10	10	15	21	19
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate	Good	Good	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	15	Moderate
Mar	14	Moderate
Apr	12	Moderate
May	9	Good
Jun	9	Good
Jul	12	Moderate
Aug	10	Good
Sep	10	Good
Oct	15	Moderate
Nov	21	Moderate
Dec	19	Moderate

Location & terrain

Where is Brejo?

Brejo sits at 3.7°S, 42.8°W, 70 m above sea level, in Brazil. The nearest listed city is Santa Quitéria do Maranhão, 30 km away.

Topography around Brejo

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

Within 3 km, the terrain around Brejo has only modest variations in elevation — a maximum elevation change of 77 m around an average of 70 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 106 m; within 80 km, only modest variations in elevation — a maximum elevation change of 172 m.

The land around Brejo is covered by trees (75%) within 3 km, trees (63%) within 16 km, and trees (69%) within 80 km.

3 km

77 m

trees 75%

16 km

106 m

trees 63%

80 km

172 m

trees 69%

treesshrubsgrasslandcroplandartificial surfaceswaterwetland

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

September weather nearby: Santa Quitéria do Maranhão 30 km · Buriti 35 km · Mata Roma 41 km · Luzilândia 49 km · São Bernardo 51 km · Miguel Alves 56 km · Esperantina 62 km · Chapadinha 68 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 Brejo (-3.6844°, -42.7503°, elevation 70 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. 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).

	Avg high (°C)	Avg low (°C)
1	36	24
2	36	24
3	36	24
4	36	24
5	36	24
6	36	24
7	36	24
8	36	24
9	36	24
10	36	24
11	36	24
12	36	24
13	36	24
14	36	24
15	36	24
16	36	24
17	36	24
18	36	24
19	37	24
20	37	24
21	37	24
22	37	24
23	37	24
24	37	24
25	37	24
26	37	24
27	37	24
28	37	24
29	37	24
30	37	24

	Clearer (%)	Cloudier (%)
1	94	6
2	94	6
3	94	6
4	94	6
5	94	6
6	94	6
7	94	6
8	94	6
9	94	6
10	94	6
11	93	7
12	93	7
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	92	8
19	92	8
20	91	9
21	91	9
22	91	9
23	91	9
24	91	9
25	91	9
26	92	8
27	92	8
28	91	9
29	91	9
30	91	9

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

	Humid (%)	Muggy (%)	Oppressive (%)
1	8	74	18
2	8	75	17
3	8	76	16
4	9	76	15
5	9	77	14
6	9	77	14
7	9	78	13
8	9	78	13
9	9	79	12
10	9	79	12
11	9	79	12
12	9	80	11
13	9	80	11
14	8	81	11
15	8	81	11
16	8	81	11
17	8	81	11
18	7	82	11
19	7	82	11
20	7	82	11
21	7	82	11
22	7	82	11
23	6	83	11
24	6	83	11
25	6	83	11
26	6	83	11
27	6	83	11
28	6	83	11
29	6	83	11
30	6	84	10

	Avg high (°C)	Avg low (°C)
1	36	24
2	36	24
3	36	24
4	36	24
5	36	24
6	36	24
7	36	24
8	36	24
9	36	24
10	36	24
11	36	24
12	36	24
13	36	24
14	36	24
15	36	24
16	36	24
17	36	24
18	36	24
19	37	24
20	37	24
21	37	24
22	37	24
23	37	24
24	37	24
25	37	24
26	37	24
27	37	24
28	37	24
29	37	24
30	37	24

	Clearer (%)	Cloudier (%)
1	94	6
2	94	6
3	94	6
4	94	6
5	94	6
6	94	6
7	94	6
8	94	6
9	94	6
10	94	6
11	93	7
12	93	7
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	92	8
19	92	8
20	91	9
21	91	9
22	91	9
23	91	9
24	91	9
25	91	9
26	92	8
27	92	8
28	91	9
29	91	9
30	91	9

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

	Humid (%)	Muggy (%)	Oppressive (%)
1	8	74	18
2	8	75	17
3	8	76	16
4	9	76	15
5	9	77	14
6	9	77	14
7	9	78	13
8	9	78	13
9	9	79	12
10	9	79	12
11	9	79	12
12	9	80	11
13	9	80	11
14	8	81	11
15	8	81	11
16	8	81	11
17	8	81	11
18	7	82	11
19	7	82	11
20	7	82	11
21	7	82	11
22	7	82	11
23	6	83	11
24	6	83	11
25	6	83	11
26	6	83	11
27	6	83	11
28	6	83	11
29	6	83	11
30	6	84	10

	Avg high (°C)	Avg low (°C)
1	36	24
2	36	24
3	36	24
4	36	24
5	36	24
6	36	24
7	36	24
8	36	24
9	36	24
10	36	24
11	36	24
12	36	24
13	36	24
14	36	24
15	36	24
16	36	24
17	36	24
18	36	24
19	37	24
20	37	24
21	37	24
22	37	24
23	37	24
24	37	24
25	37	24
26	37	24
27	37	24
28	37	24
29	37	24
30	37	24

	Clearer (%)	Cloudier (%)
1	94	6
2	94	6
3	94	6
4	94	6
5	94	6
6	94	6
7	94	6
8	94	6
9	94	6
10	94	6
11	93	7
12	93	7
13	93	7
14	93	7
15	93	7
16	92	8
17	92	8
18	92	8
19	92	8
20	91	9
21	91	9
22	91	9
23	91	9
24	91	9
25	91	9
26	92	8
27	92	8
28	91	9
29	91	9
30	91	9

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

	Humid (%)	Muggy (%)	Oppressive (%)
1	8	74	18
2	8	75	17
3	8	76	16
4	9	76	15
5	9	77	14
6	9	77	14
7	9	78	13
8	9	78	13
9	9	79	12
10	9	79	12
11	9	79	12
12	9	80	11
13	9	80	11
14	8	81	11
15	8	81	11
16	8	81	11
17	8	81	11
18	7	82	11
19	7	82	11
20	7	82	11
21	7	82	11
22	7	82	11
23	6	83	11
24	6	83	11
25	6	83	11
26	6	83	11
27	6	83	11
28	6	83	11
29	6	83	11
30	6	84	10