Nilópolis weather in August

In August, Nilópolis sees average daytime highs of 26°C and overnight lows near 16°C, with 32 mm of rain across 6.5 wet days and about 11.2 hours of daylight. It is the 9th-warmest and 12th-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 46% of the time in August, and the air most often feels humid.

Daylight stretches from about 10 h 54 min at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is Nilópolis's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Nilópolis's year-round climate.

Daytime high
26°
9th warmest
Overnight low
16°
2nd coldest
Rainfall
32 mm
6.5 wet days
Daylight
11 h 12 min
7:22 AM – 6:34 PM
Cloud cover
46%
2nd clearest
Wind
7 km/h
3rd windiest
Solar energy
4.16 kWh/m²
Travel score
7.3
out of 10

Nilópolis is human settlement in Brazil.

Air quality
Elevated
PM10 56 µg/m³ · 2012

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Nilópolis reaches about 26°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 31°C. Set against its neighbours, August runs on par with July and about 1°C cooler than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102616
112616
122616
132616
142616
152616
162616
172616
182616
192716
202716
212716
222716
232717
242717
252717
262717
272717
282717
292717
302717
312717

How August really feels in Nilópolis

Once humidity and wind are folded in, August 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

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

Nilópolis weather by month

How August compares with the rest of the year at a glance. August is the 9th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°23520.113.23.3
Feb32° / 23°16716.412.83.4
Mar30° / 22°17119.512.23.8
Apr29° / 20°8512.111.55.4
May26° / 18°589.910.96.7
Jun26° / 17°345.610.67.5
Jul26° / 16°346.110.77.6
Aug26° / 16°326.511.27.3
Sep27° / 18°669.911.96.5
Oct28° / 20°9612.812.55.5
Nov29° / 21°16517.713.14.5
Dec30° / 22°19219.413.43.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26139
36139
46040
56040
66040
76040
86040
96040
106040
115941
125941
136040
146040
156040
166040
176139
186139
196238
206238
216238
226238
236337
246337
256337
266337
276337
286238
296139
306139
316139

Chance of precipitation in August

Any precipitation

Nilópolis gets around 32 mm of rain over 6.5 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 21% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
119
219
320
420
520
620
720
820
921
1021
1121
1221
1321
1421
1521
1621
1721
1821
1921
2021
2121
2221
2322
2422
2522
2623
2723
2824
2924
3025
3125

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1836479
2836479
3836479
48364610
58374610
68374510
78374510
88374511
98374411
108374411
118364411
128364411
138364312
148374312
158374312
168374311
178374311
188374411
198374411
208364511
217354611
227344711
237344811
246334912
256325012
266325012
275315113
285305213
295305114
305295214
315285215

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 54 min at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over August. Sunrise moves from 7:32 AM to 7:08 AM, and sunset from 6:28 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:326:28
211.07:316:28
311.07:306:29
411.07:306:29
511.07:296:30
611.07:296:30
711.07:286:30
811.17:276:31
911.17:276:31
1011.17:266:32
1111.17:256:32
1211.17:256:32
1311.17:246:33
1411.27:236:33
1511.27:226:34
1611.27:226:34
1711.27:216:34
1811.27:206:35
1911.37:196:35
2011.37:186:35
2111.37:176:36
2211.37:176:36
2311.37:166:36
2411.47:156:37
2511.47:146:37
2611.47:136:38
2711.47:126:38
2811.57:116:38
2911.57:106:39
3011.57:096:39
3111.57:086:39

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.16 kWh/m².

For context, solar energy here swings from a low near 3.33 kWh/m² to a high of 5.93 kWh/m² in February across the year — August's 4.16 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Moderate
114.0Bright
124.0Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.3Bright
224.3Bright
234.3Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Nilópolis

In seasonPeak

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

Nilópolis's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Nilópolis?

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

7.3
Sightseeing
3rd-best month of the year
7.2
Beach & pool
1st-best month of the year

August is one of the better times to visit Nilópolis for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Nilópolis in August

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

In August, Nilópolis sees daytime highs around 26°C and nights near 16°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Nilópolis in August

The nearest coast averages about 21°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 km away) is warmest in March at about 26°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
Mar26Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov22Refreshing
Dec24Warm

UV index in Nilópolis in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nilópolis peaks around January 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 16UV 14Jul 13UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May6High
Jun6High
Jul5Moderate
Aug8Very high
Sep6High
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Nilópolis in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Nilópolis is worst in July — around 38 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (December, 19 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateModerateJul 1237 µg/m³Dec 2319 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar21Moderate
Apr24Moderate
May31Moderate
Jun36Poor
Jul38Poor
Aug32Moderate
Sep37Poor
Oct24Moderate
Nov20Moderate
Dec19Moderate
Location & terrain

Where is Nilópolis?

Nilópolis sits at 22.8°S, 43.4°W, 27 m above sea level, in Brazil. The nearest listed city is São João de Meriti, 4.0 km away.

Topography around Nilópolis

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

Within 3 km, the terrain around Nilópolis has only modest variations in elevation — a maximum elevation change of 175 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,010 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Nilópolis is covered by artificial surfaces (83%) within 3 km, artificial surfaces (49%) and trees (35%) within 16 km, and trees (37%), water (31%) and grassland (24%) within 80 km.

3 km
175 m
16 km
1,010 m
80 km
2,224 m
treesgrasslandartificial surfaceswaterwetlandmangroves
August weather nearby: São João de Meriti 4.0 km · Belford Roxo 5.0 km · Nova Iguaçu 7.0 km · Duque de Caxias 11 km · Queimados 18 km · Barra da Tijuca 22 km · Estácio 25 km · Rio de Janeiro 26 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 Nilópolis (-22.8075°, -43.4139°, elevation 27 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).