Duque de Caxias weather in August

In August, Duque de Caxias sees average daytime highs of 26°C and overnight lows near 17°C, with 44 mm of rain across 7.5 wet days and about 11.2 hours of daylight. It is the 10th-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 48% 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 Duque de Caxias's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Duque de Caxias's year-round climate.

Daytime high
26°
10th warmest
Overnight low
17°
2nd coldest
Rainfall
44 mm
7.5 wet days
Daylight
11 h 12 min
7:21 AM – 6:34 PM
Cloud cover
45%
2nd clearest
Wind
6 km/h
3rd windiest
Solar energy
4.15 kWh/m²
Travel score
7.2
out of 10

Duque de Caxias is human settlement in Brazil.

Air quality
Elevated
PM2.5 15.5 µg/m³ · 2015

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 Duque de Caxias reaches about 26°C in the afternoon and slips back to 17°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 on par with 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
122617
132617
142617
152617
162617
172617
182617
192617
202617
212617
222717
232717
242717
252717
262717
272717
282717
292717
302717
312717

How August really feels in Duque de Caxias

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.

Duque de Caxias weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°26621.313.23.2
Feb32° / 23°19717.812.83.3
Mar30° / 22°21621.112.23.7
Apr29° / 21°10613.511.55.2
May26° / 18°7411.110.96.6
Jun26° / 17°477.110.67.3
Jul26° / 16°477.210.77.4
Aug26° / 17°447.511.27.2
Sep27° / 18°8711.111.96.3
Oct28° / 20°12014.412.55.3
Nov28° / 21°2131913.14.4
Dec30° / 22°23721.213.43.6

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% 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 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36238
46238
56238
66238
76238
86238
96238
106238
116238
126238
136337
146337
156337
166337
176337
186337
196436
206436
216436
226436
236436
246436
256337
266337
276337
286337
296337
306337
316337

Chance of precipitation in August

Any precipitation

Duque de Caxias gets around 44 mm of rain over 7.5 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 24% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
122
222
322
423
523
623
723
823
923
1024
1124
1224
1324
1424
1524
1624
1724
1825
1925
2025
2125
2225
2325
2426
2526
2626
2726
2827
2927
3027
3128

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 18% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14305115
24305115
34305115
44305016
54295116
64295116
75285116
85285116
95275216
105275117
115275117
125265217
135265217
145265217
155265217
165265217
175265118
185265118
194265218
204265119
214255219
223255220
233245320
243245221
253245221
262235322
272235322
282235322
292225323
302225323
312215323

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 6 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
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

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 7:31 AM to 7:08 AM, and sunset from 6:27 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:316:27
211.07:316:28
311.07:306:28
411.07:296:29
511.07:296:29
611.07:286:30
711.07:286:30
811.17:276:30
911.17:266:31
1011.17:266:31
1111.17:256:32
1211.17:246:32
1311.17:236:32
1411.27:236:33
1511.27:226:33
1611.27:216:34
1711.27:206:34
1811.27:206:34
1911.37:196:35
2011.37:186:35
2111.37:176:35
2211.37:166:36
2311.37:156:36
2411.47:146:36
2511.47:136:37
2611.47:136:37
2711.47:126:37
2811.57:116:38
2911.57:106:38
3011.57:096:38
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 4.15 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 4.15 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
134.0Bright
144.1Bright
154.1Bright
164.1Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.4Bright
264.4Bright
274.4Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Duque de Caxias

In seasonPeak

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

Duque de Caxias'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 August a good time to visit Duque de Caxias?

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

7.2
Sightseeing
3rd-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for Duque de Caxias in August

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

In August, Duque de Caxias sees daytime highs around 26°C and nights near 17°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Duque de Caxias 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 38 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 Duque de Caxias 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 Duque de Caxias 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 Duque de Caxias 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 Duque de Caxias is worst in July — around 22 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 11 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Duque de Caxias's WHO annual average of 15.5 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1222 µg/m³Dec 2311 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar12Good
Apr14Moderate
May18Moderate
Jun21Moderate
Jul22Moderate
Aug19Moderate
Sep22Moderate
Oct14Moderate
Nov12Good
Dec11Good
Location & terrain

Where is Duque de Caxias?

Duque de Caxias sits at 22.8°S, 43.3°W, 15 m above sea level, in Brazil. The nearest listed city is São João de Meriti, 7.0 km away.

Topography around Duque de Caxias

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

Within 3 km, the terrain around Duque de Caxias has only modest variations in elevation — a maximum elevation change of 126 m around an average of 18 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 719 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.

The land around Duque de Caxias is covered by artificial surfaces (84%) within 3 km, artificial surfaces (48%) and trees (21%) within 16 km, and trees (39%), water (30%) and grassland (23%) within 80 km.

3 km
126 m
16 km
719 m
80 km
2,224 m
treesgrasslandartificial surfaceswaterwetlandmangroves
August weather nearby: São João de Meriti 7.0 km · Belford Roxo 9.0 km · Nilópolis 11 km · Nova Iguaçu 15 km · Estácio 18 km · Rio de Janeiro 19 km · Santa Teresa 19 km · Catete 20 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 Duque de Caxias (-22.7856°, -43.3117°, elevation 15 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).