Angra dos Reis weather in September

In September, Angra dos Reis sees average daytime highs of 23°C and overnight lows near 18°C, with 104 mm of rain across 13.3 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Angra dos Reis's 6th-clearest and 1st-windiest month. For the whole year in context, see Angra dos Reis's year-round climate.

Daytime high
23°
8th warmest
Overnight low
18°
4th coldest
Rainfall
104 mm
13.3 wet days
Daylight
11 h 54 min
6:56 AM – 6:48 PM
Cloud cover
60%
6th clearest
Wind
10 km/h
1st windiest
Solar energy
4.66 kWh/m²
Travel score
6.4
out of 10

Angra dos Reis is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical September day in Angra dos Reis reaches about 23°C in the afternoon and slips back to 18°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12317
22317
32318
42318
52318
62318
72318
82318
92318
102318
112318
122318
132318
142318
152318
162318
172318
182318
192318
202318
212318
222318
232318
242318
252318
262318
272318
282318
292318
302318

Angra dos Reis weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°30224.213.34.3
Feb27° / 23°2192012.84.6
Mar27° / 22°23222.912.24.7
Apr25° / 21°13515.711.55.9
May23° / 18°9512.410.96.6
Jun23° / 17°598.410.67.2
Jul22° / 17°648.910.77.1
Aug23° / 17°578.511.27.2
Sep23° / 18°10413.311.96.4
Oct24° / 19°13616.612.55.8
Nov24° / 20°20320.313.15.1
Dec26° / 21°24422.713.44.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25743
35644
45644
55545
65545
75446
85347
95248
105149
115050
124951
134852
144852
154654
164555
174456
184456
194258
204159
214159
223961
233862
243763
253664
263664
273565
283466
293268
303268

Chance of precipitation in September

Any precipitation

Angra dos Reis gets around 104 mm of rain over 13.3 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 43% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
133
234
334
435
536
637
737
838
939
1040
1141
1241
1342
1442
1543
1644
1745
1845
1946
2047
2148
2248
2349
2449
2550
2650
2750
2851
2951
3051

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152757110
252657120
342657130
442656140
542556150
642556150
742555160
832555170
932455180
1032454190
1132355190
1232354200
1332254210
1422155220
1522154230
1622054240
1722053250
1832051260
1932050270
2032049280
2131948291
2241947301
2341945311
2441944321
2541843331
2641842342
2741742352
2841741362
2941740372
3041640382

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

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
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:11 AM to 6:41 AM, and sunset from 6:43 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:116:43
211.67:106:43
311.67:096:44
411.67:086:44
511.67:076:44
611.67:066:45
711.77:056:45
811.77:046:45
911.77:036:45
1011.77:026:46
1111.87:016:46
1211.87:006:46
1311.86:596:47
1411.86:586:47
1511.86:576:47
1611.96:566:48
1711.96:546:48
1811.96:536:48
1911.96:526:49
2012.06:516:49
2112.06:506:49
2212.06:496:50
2312.06:486:50
2412.16:476:50
2512.16:466:51
2612.16:456:51
2712.16:446:51
2812.16:436:52
2912.26:426:52
3012.26:416:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.66 kWh/m².

For context, solar energy here swings from a low near 3.39 kWh/m² to a high of 5.9 kWh/m² in February across the year — September's 4.66 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Angra dos Reis

In seasonPeak

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

Angra dos Reis's rainy season runs October–March, 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 Angra dos Reis?

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

6.4
Sightseeing
5th-best month of the year
5.1
Beach & pool
6th-best month of the year

September is a reasonable time to visit Angra dos Reis for sightseeing.

What to pack for Angra dos Reis in September

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

In September, Angra dos Reis sees daytime highs around 23°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Angra dos Reis in September

The nearest coast averages about 22°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 14 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct23Refreshing
Nov23Refreshing
Dec25Warm

UV index in Angra dos Reis in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Angra dos Reis peaks around February 8 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 8UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep7High
Oct11Extreme
Nov12Extreme
Dec14Extreme

Air quality in Angra dos Reis 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 Angra dos Reis is worst in September — around 26 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (February, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJul 1625 µg/m³Feb 1713 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar14Moderate
Apr15Moderate
May20Moderate
Jun24Moderate
Jul26Moderate
Aug23Moderate
Sep26Moderate
Oct17Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Angra dos Reis?

Angra dos Reis sits at 23.0°S, 44.3°W, 8 m above sea level, in Brazil. The nearest listed city is Mangaratiba, 29 km away.

Topography around Angra dos Reis

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

Within 3 km, the terrain around Angra dos Reis has significant variations in elevation — a maximum elevation change of 519 m around an average of 82 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,664 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,745 m.

The land around Angra dos Reis is covered by trees (46%) and water (37%) within 3 km, water (48%) and trees (45%) within 16 km, and trees (37%), water (36%) and grassland (25%) within 80 km.

3 km
519 m
16 km
1,664 m
80 km
2,745 m
treesgrasslandartificial surfaceswatermangroves
September weather nearby: Mangaratiba 29 km · Rio Claro 37 km · Paraty 47 km · Barra Mansa 54 km · Volta Redonda 58 km · Itaguaí 58 km · Piraí 60 km · Resende 61 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 Angra dos Reis (-23.0067°, -44.3181°, elevation 8 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. 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).