Breves weather in September

In September, Breves sees average daytime highs of 33°C and overnight lows near 25°C, with 25 mm of rain across 6.6 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 55% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Breves's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Breves's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
25°
10th coldest
Rainfall
25 mm
6.6 wet days
Daylight
12 hours
6:17 AM – 6:16 PM
Cloud cover
43%
2nd clearest
Wind
9 km/h
2nd windiest
Solar energy
6.3 kWh/m²
Travel score
4.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in Breves reaches about 33°C in the afternoon and slips back to 25°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13325
23325
33325
43325
53325
63325
73325
83325
93325
103325
113325
123325
133325
143325
153325
163325
173325
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303325

How September really feels in Breves

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
4 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Breves weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°25028.112.12.7
Feb30° / 24°32326.812.12.7
Mar30° / 24°39730122.6
Apr30° / 24°37328.9122.6
May31° / 24°28627.811.92.8
Jun31° / 24°14421.611.93.3
Jul31° / 24°8416.411.93.9
Aug32° / 25°399.511.94.1
Sep33° / 25°256.6124.0
Oct33° / 25°337.7123.7
Nov33° / 25°549.312.13.6
Dec32° / 25°12519.812.13.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 19%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28515
38416
48416
58416
68317
78317
88317
98218
108218
118218
128218
138218
148218
158119
168218
178218
188119
198119
208119
218119
228119
238020
248020
257921
267921
277921
287822
297822
307723

Chance of precipitation in September

Any precipitation

Breves gets around 25 mm of rain over 6.6 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 23% and peaks near 26% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
125
226
326
426
526
625
725
825
925
1025
1124
1224
1324
1423
1523
1622
1722
1821
1921
2021
2120
2220
2320
2419
2519
2619
2719
2820
2920
3020

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
14852
24951
35050
45149
55347
65347
75446
85545
95644
105644
115743
125743
135842
145842
155941
166040
176040
186139
196238
206337
216436
226535
236634
246634
256733
266832
276931
286931
297030
307030

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:23 AM to 6:11 AM, and sunset from 6:21 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:236:21
212.06:226:20
312.06:226:20
412.06:216:20
512.06:216:19
612.06:216:19
712.06:206:19
812.06:206:19
912.06:196:18
1012.06:196:18
1112.06:196:18
1212.06:186:17
1312.06:186:17
1412.06:176:17
1512.06:176:16
1612.06:176:16
1712.06:166:16
1812.06:166:15
1912.06:156:15
2012.06:156:15
2112.06:146:14
2212.06:146:14
2312.06:146:14
2412.06:136:13
2512.06:136:13
2612.06:126:13
2712.06:126:12
2812.06:126:12
2912.06:116:12
3012.06:116:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.3 kWh/m².

For context, solar energy here swings from a low near 3.94 kWh/m² to a high of 6.42 kWh/m² in October across the year — September's 6.3 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Breves

In seasonPeak

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

Breves'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 Breves?

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

4.0
Sightseeing
2nd-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for Breves in September

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

In September, Breves sees daytime highs around 33°C and nights near 25°C. Pack light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Breves 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 Breves peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 18 at about 10 (extreme).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jul 18UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Breves 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 Breves is worst in February — around 19 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2019 µg/m³Jun 229 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar19Moderate
Apr16Moderate
May11Good
Jun9Good
Jul10Good
Aug10Good
Sep13Moderate
Oct15Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Breves?

Breves sits at 1.7°S, 50.5°W, 7 m above sea level, in Brazil. The nearest listed city is Melgaço, 29 km away.

Topography around Breves

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

Within 3 km, the terrain around Breves has only modest variations in elevation — a maximum elevation change of 28 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 75 m.

The land around Breves is covered by trees (70%) within 3 km, trees (92%) within 16 km, and trees (90%) within 80 km.

3 km
28 m
16 km
37 m
80 km
75 m
treesgrasslandartificial surfaceswater
September weather nearby: Melgaço 29 km · Bagre 39 km · Portel 47 km · Curralinho 78 km · Oeiras do Pará 78 km · Anajás 98 km · São Sebastião da Boa Vista 106 km · Limoeiro do Ajuru 124 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
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Breves (-1.6822°, -50.4803°, elevation 7 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).