Barreirinha weather in September

In September, Barreirinha sees average daytime highs of 32°C and overnight lows near 26°C, with 94 mm of rain across 14.5 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-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 34% of the time in September, and the air most often feels miserable.

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

Daytime high: 32°; 1st warmest
Overnight low: 26°; 12th coldest
Rainfall: 94 mm; 14.5 wet days
Daylight: 12 hours; 5:43 AM – 5:42 PM
Cloud cover: 57%; 3rd clearest
Wind: 6 km/h; 1st windiest
Solar energy: 5.63 kWh/m²
Travel score: 3.6; out of 10

← August Barreirinha 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 Barreirinha reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°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)	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26	26

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

How September really feels in Barreirinha

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

30 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.

Barreirinha weather by month

How September compares with the rest of the year at a glance. September is the 1st-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	30° / 25°	333	28	12.1	2.9
Feb	29° / 24°	343	25.8	12.1	3.0
Mar	29° / 25°	373	28.9	12	2.9
Apr	29° / 25°	363	28.9	11.9	2.7
May	30° / 25°	287	28.6	11.9	2.9
Jun	30° / 25°	152	23.3	11.8	3.3
Jul	31° / 25°	112	19.9	11.9	3.7
Aug	31° / 25°	85	15.6	11.9	3.8
Sep	32° / 26°	94	14.5	12	3.6
Oct	32° / 26°	123	15.9	12.1	3.4
Nov	31° / 26°	156	18.9	12.1	3.2
Dec	31° / 25°	251	24.8	12.2	3.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 47%.

	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 (%)	56	55	55	55	54	55	54	54	54	54	54	54	54	54	54	54	54	54	53	53	53	53	53	53	53	53	52	51	50	50
Cloudier (%)	44	45	45	45	46	45	46	46	46	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47	47	47	48	49	50	50

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	54	46
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	54	46
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	54	46
18	54	46
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	52	48
28	51	49
29	50	50
30	50	50

Chance of precipitation in September

Any precipitation

Barreirinha gets around 94 mm of rain over 14.5 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 48% and peaks near 51% 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 (%)	51	51	51	51	51	51	51	50	50	49	49	49	48	48	47	47	46	46	46	46	46	46	46	46	46	46	46	46	46	46

	Rain chance (%)
1	51
2	51
3	51
4	51
5	51
6	51
7	51
8	50
9	50
10	49
11	49
12	49
13	48
14	48
15	47
16	47
17	46
18	46
19	46
20	46
21	46
22	46
23	46
24	46
25	46
26	46
27	46
28	46
29	46
30	46

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 88% 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
Oppressive (%)	8	8	8	8	9	9	9	9	9	10	10	10	10	11	11	11	12	12	12	13	13	13	14	14	15	15	16	16	16	16
Miserable (%)	92	92	92	92	91	91	91	91	91	90	90	90	90	89	89	89	88	88	88	87	87	87	86	86	85	85	84	84	84	84

	Oppressive (%)	Miserable (%)
1	8	92
2	8	92
3	8	92
4	8	92
5	9	91
6	9	91
7	9	91
8	9	91
9	9	91
10	10	90
11	10	90
12	10	90
13	10	90
14	11	89
15	11	89
16	11	89
17	12	88
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	14	86
25	15	85
26	15	85
27	16	84
28	16	84
29	16	84
30	16	84

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 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)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
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	6	calm
2	6	calm
3	6	calm
4	6	calm
5	6	calm
6	6	calm
7	6	calm
8	6	calm
9	6	calm
10	6	calm
11	6	calm
12	6	calm
13	6	calm
14	6	calm
15	6	calm
16	6	calm
17	6	calm
18	6	calm
19	6	calm
20	6	calm
21	6	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	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 5:50 AM to 5:37 AM, and sunset from 5:46 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
Daylight (h)	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	12.0
Sunrise (AM)	5:50	5:49	5:49	5:48	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	5:39	5:39	5:38	5:38	5:37	5:37
Sunset (PM)	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	5:42	5:42	5:42	5:42	5:41	5:41	5:41	5:40	5:40	5:40	5:40	5:39	5:39	5:39	5:38	5:38

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	5:50	5:46
2	11.9	5:49	5:46
3	12.0	5:49	5:46
4	12.0	5:48	5:46
5	12.0	5:48	5:45
6	12.0	5:48	5:45
7	12.0	5:47	5:45
8	12.0	5:47	5:44
9	12.0	5:46	5:44
10	12.0	5:46	5:44
11	12.0	5:45	5:44
12	12.0	5:45	5:43
13	12.0	5:44	5:43
14	12.0	5:44	5:43
15	12.0	5:44	5:42
16	12.0	5:43	5:42
17	12.0	5:43	5:42
18	12.0	5:42	5:42
19	12.0	5:42	5:41
20	12.0	5:41	5:41
21	12.0	5:41	5:41
22	12.0	5:40	5:40
23	12.0	5:40	5:40
24	12.0	5:39	5:40
25	12.0	5:39	5:40
26	12.0	5:39	5:39
27	12.0	5:38	5:39
28	12.0	5:38	5:39
29	12.0	5:37	5:38
30	12.0	5:37	5:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.71 kWh/m² to a high of 5.63 kWh/m² in September across the year — September's 5.63 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)	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
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	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

Planning a trip in September

Hazard calendar for Barreirinha

In seasonPeak

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

Barreirinha's rainy season runs December–May, 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 Barreirinha?

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

3.6

Sightseeing

3rd-best month of the year

5.8

Beach & pool

2nd-best month of the year

September is a weaker month for outdoor sightseeing in Barreirinha.

What to pack for Barreirinha in September

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

In September, Barreirinha sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Barreirinha 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 Barreirinha peaks around February 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 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	15	14	11	10	10	11	12	11	9	12
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	Extreme

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

Air quality in Barreirinha 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 Barreirinha is worst in November — around 29 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (June, 10 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)	15	14	14	13	11	10	11	16	23	28	29	19
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	14	Moderate
Mar	14	Moderate
Apr	13	Moderate
May	11	Good
Jun	10	Good
Jul	11	Good
Aug	16	Moderate
Sep	23	Moderate
Oct	28	Moderate
Nov	29	Moderate
Dec	19	Moderate

Location & terrain

Where is Barreirinha?

Barreirinha sits at 2.8°S, 57.1°W, 13 m above sea level, in Brazil. The nearest listed city is Parintins, 41 km away.

Topography around Barreirinha

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

Within 3 km, the terrain around Barreirinha has only modest variations in elevation — a maximum elevation change of 27 m around an average of 16 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 61 m; within 80 km, only modest variations in elevation — a maximum elevation change of 149 m.

The land around Barreirinha is covered by trees (46%) and grassland (32%) within 3 km, trees (38%), water (28%) and grassland (22%) within 16 km, and trees (70%) within 80 km.

3 km

27 m

trees 46%

16 km

61 m

trees 38%

80 km

149 m

trees 70%

treesgrasslandartificial surfaceswaterwetland

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

September weather nearby: Parintins 41 km · Nhamundá 78 km · Urucará 82 km · Maués 97 km · Terra Santa 100 km · Urucurituba 126 km · Juruti 130 km · Itacoatiara 157 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 Barreirinha (-2.7933°, -57.07°, elevation 13 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	32	26
2	32	26
3	32	26
4	32	26
5	32	26
6	32	26
7	32	26
8	32	26
9	32	26
10	32	26
11	32	26
12	32	26
13	32	26
14	32	26
15	32	26
16	32	26
17	32	26
18	32	26
19	32	26
20	32	26
21	32	26
22	32	26
23	32	26
24	32	26
25	32	26
26	32	26
27	32	26
28	32	26
29	32	26
30	32	26

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	54	46
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	54	46
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	54	46
18	54	46
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	52	48
28	51	49
29	50	50
30	50	50

	Rain chance (%)
1	51
2	51
3	51
4	51
5	51
6	51
7	51
8	50
9	50
10	49
11	49
12	49
13	48
14	48
15	47
16	47
17	46
18	46
19	46
20	46
21	46
22	46
23	46
24	46
25	46
26	46
27	46
28	46
29	46
30	46

	Oppressive (%)	Miserable (%)
1	8	92
2	8	92
3	8	92
4	8	92
5	9	91
6	9	91
7	9	91
8	9	91
9	9	91
10	10	90
11	10	90
12	10	90
13	10	90
14	11	89
15	11	89
16	11	89
17	12	88
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	14	86
25	15	85
26	15	85
27	16	84
28	16	84
29	16	84
30	16	84

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

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	54	46
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	54	46
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	54	46
18	54	46
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	52	48
28	51	49
29	50	50
30	50	50

	Rain chance (%)
1	51
2	51
3	51
4	51
5	51
6	51
7	51
8	50
9	50
10	49
11	49
12	49
13	48
14	48
15	47
16	47
17	46
18	46
19	46
20	46
21	46
22	46
23	46
24	46
25	46
26	46
27	46
28	46
29	46
30	46

	Oppressive (%)	Miserable (%)
1	8	92
2	8	92
3	8	92
4	8	92
5	9	91
6	9	91
7	9	91
8	9	91
9	9	91
10	10	90
11	10	90
12	10	90
13	10	90
14	11	89
15	11	89
16	11	89
17	12	88
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	14	86
25	15	85
26	15	85
27	16	84
28	16	84
29	16	84
30	16	84

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

	Clearer (%)	Cloudier (%)
1	56	44
2	55	45
3	55	45
4	55	45
5	54	46
6	55	45
7	54	46
8	54	46
9	54	46
10	54	46
11	54	46
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	54	46
18	54	46
19	53	47
20	53	47
21	53	47
22	53	47
23	53	47
24	53	47
25	53	47
26	53	47
27	52	48
28	51	49
29	50	50
30	50	50

	Rain chance (%)
1	51
2	51
3	51
4	51
5	51
6	51
7	51
8	50
9	50
10	49
11	49
12	49
13	48
14	48
15	47
16	47
17	46
18	46
19	46
20	46
21	46
22	46
23	46
24	46
25	46
26	46
27	46
28	46
29	46
30	46

	Oppressive (%)	Miserable (%)
1	8	92
2	8	92
3	8	92
4	8	92
5	9	91
6	9	91
7	9	91
8	9	91
9	9	91
10	10	90
11	10	90
12	10	90
13	10	90
14	11	89
15	11	89
16	11	89
17	12	88
18	12	88
19	12	88
20	13	87
21	13	87
22	13	87
23	14	86
24	14	86
25	15	85
26	15	85
27	16	84
28	16	84
29	16	84
30	16	84