Estácio weather in September

In September, Estácio sees average daytime highs of 26°C and overnight lows near 20°C, with 75 mm of rain across 10.4 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 37% of the time in September, and the air most often feels muggy.

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 Estácio's 6th-clearest and 1st-windiest month. For the whole year in context, see Estácio's year-round climate.

Daytime high
26°
9th warmest
Overnight low
20°
4th coldest
Rainfall
75 mm
10.4 wet days
Daylight
11 h 54 min
6:51 AM – 6:43 PM
Cloud cover
55%
6th clearest
Wind
12 km/h
1st windiest
Solar energy
4.65 kWh/m²
Travel score
6.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Estácio reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, September runs on par with August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72619
82619
92619
102619
112619
122619
132619
142620
152620
162620
172620
182620
192620
202620
212620
222620
232620
242620
252620
262620
272620
282620
292620
302620

How September really feels in Estácio

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Estácio weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°17116.413.24.3
Feb30° / 24°11413.112.84.4
Mar29° / 24°14516.612.24.7
Apr28° / 22°881211.56.0
May26° / 20°7611.310.96.7
Jun25° / 19°487.310.67.5
Jul25° / 18°517.810.77.5
Aug25° / 19°417.511.27.5
Sep26° / 20°7510.411.96.8
Oct26° / 21°9211.512.56.2
Nov27° / 22°1391613.15.4
Dec29° / 23°15116.413.44.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26238
36238
46139
56139
66040
75941
85743
95644
105545
115446
125347
135248
145149
155050
164852
174753
184753
194654
204555
214555
224456
234357
244258
254258
264159
274159
284159
294159
304060

Chance of precipitation in September

Any precipitation

Estácio gets around 75 mm of rain over 10.4 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 34% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
126
227
327
427
528
628
729
829
930
1030
1131
1231
1331
1432
1533
1633
1734
1835
1936
2037
2138
2238
2339
2439
2540
2640
2740
2840
2940
3040

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
121248371
221248371
321248371
421247381
521247381
621247381
721247381
821147391
921147391
1011147401
1111047401
1211047411
1311046422
141945432
151944442
161943452
171842462
181841472
191840473
201840483
212938484
222937484
232937485
242936486
252935487
262934487
272933488
282933479
2929324710
3029324710

Wind in September

Winds average 12 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

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 7:06 AM to 6:37 AM, and sunset from 6:39 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:066:39
211.67:056:39
311.67:056:39
411.67:036:40
511.67:026:40
611.67:016:40
711.77:006:40
811.76:596:41
911.76:586:41
1011.76:576:41
1111.86:566:42
1211.86:556:42
1311.86:546:42
1411.86:536:43
1511.86:526:43
1611.96:516:43
1711.96:506:44
1811.96:496:44
1911.96:486:44
2012.06:476:44
2112.06:466:45
2212.06:456:45
2312.06:446:45
2412.16:436:46
2512.16:426:46
2612.16:416:46
2712.16:406:47
2812.16:396:47
2912.26:386:47
3012.26:376:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.65 kWh/m².

For context, solar energy here swings from a low near 3.35 kWh/m² to a high of 6.1 kWh/m² in February across the year — September's 4.65 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
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
274.7Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Estácio?

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

6.8
Sightseeing
4th-best month of the year
6.4
Beach & pool
5th-best month of the year

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

What to pack for Estácio in September

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

In September, Estácio sees daytime highs around 26°C and nights near 20°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Estácio in September

The nearest coast averages about 21°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 24 km away) is warmest in March at about 25°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°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan25Warm
Feb25Warm
Mar25Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Warm

UV index in Estácio in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Estácio peaks around January 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 13UV 14Jul 13UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr9Very high
May6High
Jun6High
Jul5Moderate
Aug8Very high
Sep6High
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Estácio 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 Estácio is worst in June — around 34 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (February, 17 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2234 µg/m³Feb 1617 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb17Moderate
Mar18Moderate
Apr19Moderate
May26Moderate
Jun34Moderate
Jul33Moderate
Aug28Moderate
Sep29Moderate
Oct22Moderate
Nov18Moderate
Dec18Moderate
Location & terrain

Where is Estácio?

Estácio sits at 22.9°S, 43.2°W, 50 m above sea level, in Brazil. The nearest listed city is Santa Teresa, 2.0 km away.

Topography around Estácio

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

Within 3 km, the terrain around Estácio has large variations in elevation — a maximum elevation change of 617 m around an average of 65 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 971 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Estácio is covered by artificial surfaces (63%) and trees (32%) within 3 km, water (46%), artificial surfaces (29%) and trees (22%) within 16 km, and trees (37%) and water (36%) within 80 km.

3 km
617 m
16 km
971 m
80 km
2,252 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Santa Teresa 2.0 km · Catete 2.0 km · Rio de Janeiro 3.0 km · Copacabana 6.0 km · Ipanema 7.0 km · Leblon 8.0 km · Rocinha 9.0 km · Vidigal 9.0 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 Estácio (-22.9182°, -43.204°, elevation 50 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).