Trairão weather in September

In September, Trairão sees average daytime highs of 34°C and overnight lows near 24°C, with 82 mm of rain across 14.4 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 30% 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 Trairão's 4th-clearest and 1st-windiest month. For the whole year in context, see Trairão's year-round climate.

Daytime high: 34°; 1st warmest
Overnight low: 24°; 12th coldest
Rainfall: 82 mm; 14.4 wet days
Daylight: 12 hours; 6:39 AM – 6:37 PM
Cloud cover: 59%; 4th clearest
Wind: 5 km/h; 1st windiest
Solar energy: 5.73 kWh/m²
Travel score: 2.9; out of 10

← August Trairão 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 34°C through the month.

A typical September day in Trairão reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°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)	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34	34
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	34	24
2	34	24
3	34	24
4	34	24
5	34	24
6	34	24
7	34	24
8	34	24
9	34	24
10	34	24
11	34	24
12	34	24
13	34	24
14	34	24
15	34	24
16	34	24
17	34	24
18	34	24
19	34	24
20	34	24
21	34	24
22	34	24
23	34	24
24	34	24
25	34	24
26	34	24
27	34	24
28	34	24
29	34	24
30	34	24

How September really feels in Trairão

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

28 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.

Trairão weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 23°	283	28	12.2	2.7
Feb	30° / 23°	290	26.1	12.1	2.7
Mar	30° / 23°	323	29.4	12	2.7
Apr	30° / 23°	298	28.7	11.9	2.6
May	30° / 23°	208	26.2	11.8	3.0
Jun	31° / 23°	83	15.4	11.7	3.8
Jul	32° / 23°	56	11.8	11.8	3.9
Aug	33° / 23°	50	10.4	11.9	3.4
Sep	34° / 24°	82	14.4	12	2.9
Oct	33° / 24°	127	17.9	12.1	2.7
Nov	32° / 24°	173	20.8	12.2	2.7
Dec	31° / 23°	223	25.4	12.3	2.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to cloud over 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 (%)	58	57	56	55	54	53	52	52	51	51	51	51	52	52	52	52	52	52	51	52	51	51	51	51	50	49	48	47	46	45
Cloudier (%)	42	43	44	45	46	47	48	48	49	49	49	49	48	48	48	48	48	48	49	48	49	49	49	49	50	51	52	53	54	55

	Clearer (%)	Cloudier (%)
1	58	42
2	57	43
3	56	44
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	51	49
13	52	48
14	52	48
15	52	48
16	52	48
17	52	48
18	52	48
19	51	49
20	52	48
21	51	49
22	51	49
23	51	49
24	51	49
25	50	50
26	49	51
27	48	52
28	47	53
29	46	54
30	45	55

Chance of precipitation in September

Any precipitation

Trairão gets around 82 mm of rain over 14.4 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 47% and peaks near 52% on the wettest days. The odds climb 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 (%)	43	44	44	45	46	46	46	46	46	46	46	46	46	46	47	47	47	47	48	48	48	49	49	49	50	50	51	51	52	52

	Rain chance (%)
1	43
2	44
3	44
4	45
5	46
6	46
7	46
8	46
9	46
10	46
11	46
12	46
13	46
14	46
15	47
16	47
17	47
18	47
19	48
20	48
21	48
22	49
23	49
24	49
25	50
26	50
27	51
28	51
29	52
30	52

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 65% 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 (%)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2
Oppressive (%)	72	72	71	70	69	69	68	67	67	66	65	64	64	63	64	63	63	62	63	63	63	63	63	63	63	64	64	64	64	63
Miserable (%)	24	24	25	26	27	27	28	29	29	30	31	32	32	33	33	34	34	35	35	35	35	35	35	35	35	34	34	34	34	35

	Muggy (%)	Oppressive (%)	Miserable (%)
1	4	72	24
2	4	72	24
3	4	71	25
4	4	70	26
5	4	69	27
6	4	69	27
7	4	68	28
8	4	67	29
9	4	67	29
10	4	66	30
11	4	65	31
12	4	64	32
13	4	64	32
14	4	63	33
15	3	64	33
16	3	63	34
17	3	63	34
18	3	62	35
19	2	63	35
20	2	63	35
21	2	63	35
22	2	63	35
23	2	63	35
24	2	63	35
25	2	63	35
26	2	64	34
27	2	64	34
28	2	64	34
29	2	64	34
30	2	63	35

Wind in September

Winds average 5 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 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)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	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 6:46 AM to 6:32 AM, and sunset from 6:41 PM to 6:34 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	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
Sunrise (AM)	6:46	6:46	6:45	6:45	6:44	6:44	6:43	6:43	6:42	6:42	6:41	6:41	6:40	6:40	6:39	6:39	6:38	6:38	6:37	6:37	6:36	6:36	6:35	6:35	6:34	6:34	6:33	6:33	6:32	6:32
Sunset (PM)	6:41	6:41	6:40	6:40	6:40	6:40	6:40	6:39	6:39	6:39	6:39	6:38	6:38	6:38	6:38	6:37	6:37	6:37	6:37	6:36	6:36	6:36	6:36	6:35	6:35	6:35	6:35	6:35	6:34	6:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.9	6:46	6:41
2	11.9	6:46	6:41
3	11.9	6:45	6:40
4	11.9	6:45	6:40
5	11.9	6:44	6:40
6	11.9	6:44	6:40
7	11.9	6:43	6:40
8	11.9	6:43	6:39
9	11.9	6:42	6:39
10	11.9	6:42	6:39
11	12.0	6:41	6:39
12	12.0	6:41	6:38
13	12.0	6:40	6:38
14	12.0	6:40	6:38
15	12.0	6:39	6:38
16	12.0	6:39	6:37
17	12.0	6:38	6:37
18	12.0	6:38	6:37
19	12.0	6:37	6:37
20	12.0	6:37	6:36
21	12.0	6:36	6:36
22	12.0	6:36	6:36
23	12.0	6:35	6:36
24	12.0	6:35	6:35
25	12.0	6:34	6:35
26	12.0	6:34	6:35
27	12.0	6:33	6:35
28	12.0	6:33	6:35
29	12.0	6:32	6:34
30	12.0	6:32	6:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.73 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 5.73 kWh/m² in September across the year — September's 5.73 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)	5.6	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	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8	5.8
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	5.6	Bright
2	5.6	Bright
3	5.6	Bright
4	5.6	Bright
5	5.6	Bright
6	5.7	Bright
7	5.7	Bright
8	5.7	Bright
9	5.7	Bright
10	5.7	Bright
11	5.7	Bright
12	5.7	Bright
13	5.7	Bright
14	5.7	Bright
15	5.8	Bright
16	5.8	Bright
17	5.8	Bright
18	5.8	Bright
19	5.8	Bright
20	5.8	Bright
21	5.8	Bright
22	5.8	Bright
23	5.8	Bright
24	5.8	Bright
25	5.8	Bright
26	5.8	Bright
27	5.8	Bright
28	5.8	Bright
29	5.8	Bright
30	5.8	Bright

Planning a trip in September

Hazard calendar for Trairão

In seasonPeak

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

Trairão's rainy season runs November–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 Trairão?

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

2.9

Sightseeing

5th-best month of the year

5.5

Beach & pool

4th-best month of the year

September is a weaker month for outdoor sightseeing in Trairão.

What to pack for Trairão in September

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

In September, Trairão sees daytime highs around 34°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in Trairão in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Trairão peaks around March 10 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	15	15	14	11	10	10	11	10	10	10	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	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	10	Extreme
Oct	10	Extreme
Nov	10	Extreme
Dec	11	Extreme

Air quality in Trairão 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 Trairão is worst in August — around 47 µg/m³ PM2.5 (poor), about 5.2× 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)	14	13	13	12	10	9	15	47	47	39	32	20
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate	Poor	Poor	Poor	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	13	Moderate
Mar	13	Moderate
Apr	12	Moderate
May	10	Good
Jun	9	Good
Jul	15	Moderate
Aug	47	Poor
Sep	47	Poor
Oct	39	Poor
Nov	32	Moderate
Dec	20	Moderate

Location & terrain

Where is Trairão?

Trairão sits at 4.6°S, 55.9°W, 79 m above sea level, in Brazil. The nearest listed city is Itaituba, 33 km away.

Topography around Trairão

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

Within 3 km, the terrain around Trairão has only modest variations in elevation — a maximum elevation change of 67 m around an average of 75 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 324 m; within 80 km, significant variations in elevation — a maximum elevation change of 424 m.

The land around Trairão is covered by trees (83%) within 3 km, trees (82%) within 16 km, and trees (89%) within 80 km.

3 km

67 m

trees 83%

16 km

324 m

trees 82%

80 km

424 m

trees 89%

treesgrasslandwater

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

September weather nearby: Itaituba 33 km · Rurópolis 126 km · Aveiro 127 km · Placas 207 km · Parintins 234 km · Barreirinha 234 km · Maués 237 km · Belterra 243 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 Trairão (-4.5744°, -55.9436°, elevation 79 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	34	24
2	34	24
3	34	24
4	34	24
5	34	24
6	34	24
7	34	24
8	34	24
9	34	24
10	34	24
11	34	24
12	34	24
13	34	24
14	34	24
15	34	24
16	34	24
17	34	24
18	34	24
19	34	24
20	34	24
21	34	24
22	34	24
23	34	24
24	34	24
25	34	24
26	34	24
27	34	24
28	34	24
29	34	24
30	34	24

	Clearer (%)	Cloudier (%)
1	58	42
2	57	43
3	56	44
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	51	49
13	52	48
14	52	48
15	52	48
16	52	48
17	52	48
18	52	48
19	51	49
20	52	48
21	51	49
22	51	49
23	51	49
24	51	49
25	50	50
26	49	51
27	48	52
28	47	53
29	46	54
30	45	55

	Rain chance (%)
1	43
2	44
3	44
4	45
5	46
6	46
7	46
8	46
9	46
10	46
11	46
12	46
13	46
14	46
15	47
16	47
17	47
18	47
19	48
20	48
21	48
22	49
23	49
24	49
25	50
26	50
27	51
28	51
29	52
30	52

	Muggy (%)	Oppressive (%)	Miserable (%)
1	4	72	24
2	4	72	24
3	4	71	25
4	4	70	26
5	4	69	27
6	4	69	27
7	4	68	28
8	4	67	29
9	4	67	29
10	4	66	30
11	4	65	31
12	4	64	32
13	4	64	32
14	4	63	33
15	3	64	33
16	3	63	34
17	3	63	34
18	3	62	35
19	2	63	35
20	2	63	35
21	2	63	35
22	2	63	35
23	2	63	35
24	2	63	35
25	2	63	35
26	2	64	34
27	2	64	34
28	2	64	34
29	2	64	34
30	2	63	35

	Avg high (°C)	Avg low (°C)
1	34	24
2	34	24
3	34	24
4	34	24
5	34	24
6	34	24
7	34	24
8	34	24
9	34	24
10	34	24
11	34	24
12	34	24
13	34	24
14	34	24
15	34	24
16	34	24
17	34	24
18	34	24
19	34	24
20	34	24
21	34	24
22	34	24
23	34	24
24	34	24
25	34	24
26	34	24
27	34	24
28	34	24
29	34	24
30	34	24

	Clearer (%)	Cloudier (%)
1	58	42
2	57	43
3	56	44
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	51	49
13	52	48
14	52	48
15	52	48
16	52	48
17	52	48
18	52	48
19	51	49
20	52	48
21	51	49
22	51	49
23	51	49
24	51	49
25	50	50
26	49	51
27	48	52
28	47	53
29	46	54
30	45	55

	Rain chance (%)
1	43
2	44
3	44
4	45
5	46
6	46
7	46
8	46
9	46
10	46
11	46
12	46
13	46
14	46
15	47
16	47
17	47
18	47
19	48
20	48
21	48
22	49
23	49
24	49
25	50
26	50
27	51
28	51
29	52
30	52

	Muggy (%)	Oppressive (%)	Miserable (%)
1	4	72	24
2	4	72	24
3	4	71	25
4	4	70	26
5	4	69	27
6	4	69	27
7	4	68	28
8	4	67	29
9	4	67	29
10	4	66	30
11	4	65	31
12	4	64	32
13	4	64	32
14	4	63	33
15	3	64	33
16	3	63	34
17	3	63	34
18	3	62	35
19	2	63	35
20	2	63	35
21	2	63	35
22	2	63	35
23	2	63	35
24	2	63	35
25	2	63	35
26	2	64	34
27	2	64	34
28	2	64	34
29	2	64	34
30	2	63	35

	Avg high (°C)	Avg low (°C)
1	34	24
2	34	24
3	34	24
4	34	24
5	34	24
6	34	24
7	34	24
8	34	24
9	34	24
10	34	24
11	34	24
12	34	24
13	34	24
14	34	24
15	34	24
16	34	24
17	34	24
18	34	24
19	34	24
20	34	24
21	34	24
22	34	24
23	34	24
24	34	24
25	34	24
26	34	24
27	34	24
28	34	24
29	34	24
30	34	24

	Clearer (%)	Cloudier (%)
1	58	42
2	57	43
3	56	44
4	55	45
5	54	46
6	53	47
7	52	48
8	52	48
9	51	49
10	51	49
11	51	49
12	51	49
13	52	48
14	52	48
15	52	48
16	52	48
17	52	48
18	52	48
19	51	49
20	52	48
21	51	49
22	51	49
23	51	49
24	51	49
25	50	50
26	49	51
27	48	52
28	47	53
29	46	54
30	45	55

	Rain chance (%)
1	43
2	44
3	44
4	45
5	46
6	46
7	46
8	46
9	46
10	46
11	46
12	46
13	46
14	46
15	47
16	47
17	47
18	47
19	48
20	48
21	48
22	49
23	49
24	49
25	50
26	50
27	51
28	51
29	52
30	52

	Muggy (%)	Oppressive (%)	Miserable (%)
1	4	72	24
2	4	72	24
3	4	71	25
4	4	70	26
5	4	69	27
6	4	69	27
7	4	68	28
8	4	67	29
9	4	67	29
10	4	66	30
11	4	65	31
12	4	64	32
13	4	64	32
14	4	63	33
15	3	64	33
16	3	63	34
17	3	63	34
18	3	62	35
19	2	63	35
20	2	63	35
21	2	63	35
22	2	63	35
23	2	63	35
24	2	63	35
25	2	63	35
26	2	64	34
27	2	64	34
28	2	64	34
29	2	64	34
30	2	63	35