Cachoeiras de Macacu weather in August

In August, Cachoeiras de Macacu sees average daytime highs of 24°C and overnight lows near 14°C, with 51 mm of rain across 7.7 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 45% of the time in August, and the air most often feels comfortable.

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

Daytime high
24°
10th warmest
Overnight low
14°
2nd coldest
Rainfall
51 mm
7.7 wet days
Daylight
11 h 12 min
7:18 AM – 6:31 PM
Cloud cover
47%
2nd clearest
Wind
6 km/h
3rd windiest
Solar energy
4.27 kWh/m²
Travel score
7.5
out of 10

Cachoeiras de Macacu is human settlement in Brazil.

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 24°C through the month.

A typical August day in Cachoeiras de Macacu reaches about 24°C in the afternoon and slips back to 14°C overnight — a 9°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, August runs on par with July and about 1°C cooler than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12314
22314
32414
42414
52414
62414
72414
82414
92414
102414
112414
122414
132414
142414
152414
162414
172414
182414
192414
202415
212415
222415
232415
242415
252415
262415
272415
282415
292415
302415
312515

Cachoeiras de Macacu weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 21°36224.113.23.9
Feb29° / 20°2772012.84.0
Mar28° / 20°2872412.24.3
Apr26° / 18°13416.411.55.6
May24° / 16°871210.96.7
Jun24° / 15°497.710.77.5
Jul23° / 14°487.110.87.6
Aug24° / 14°517.711.27.5
Sep25° / 16°10812.311.96.6
Oct25° / 18°15916.512.55.6
Nov26° / 19°29721.613.14.7
Dec27° / 20°36724.713.44.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
36139
46139
56139
66139
76139
86040
96139
106139
116139
126040
136040
146040
156139
166139
176139
186139
196139
206139
216139
226238
236238
246139
256139
266139
276139
286139
296139
306139
316139

Chance of precipitation in August

Any precipitation

Cachoeiras de Macacu gets around 51 mm of rain over 7.7 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 25% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
123
223
323
423
523
624
724
824
924
1024
1125
1225
1325
1425
1525
1625
1725
1826
1926
2026
2126
2226
2326
2426
2527
2627
2728
2828
2929
3029
3130

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 48% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12051281
22051281
31951291
41950292
51950292
61950292
71950292
81950292
91950292
101950302
111949302
121949302
131949302
141949302
151949302
161949302
171949302
181949302
191849312
201849322
211748322
221748332
231648342
241547352
251547362
261446373
271446373
281445383
291344394
301344394
311343404

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 5 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
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
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 11 hours 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 30 minutes over August. Sunrise moves from 7:28 AM to 7:05 AM, and sunset from 6:25 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:286:25
211.07:276:26
311.07:276:26
411.07:266:27
511.07:266:27
611.07:256:27
711.17:256:28
811.17:246:28
911.17:236:29
1011.17:236:29
1111.17:226:29
1211.17:216:30
1311.27:206:30
1411.27:206:31
1511.27:196:31
1611.27:186:31
1711.27:176:32
1811.37:176:32
1911.37:166:32
2011.37:156:33
2111.37:146:33
2211.37:136:33
2311.47:126:34
2411.47:116:34
2511.47:116:34
2611.47:106:35
2711.47:096:35
2811.57:086:35
2911.57:076:36
3011.57:066:36
3111.57:056:36

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.27 kWh/m².

For context, solar energy here swings from a low near 3.44 kWh/m² to a high of 5.99 kWh/m² in February across the year — August's 4.27 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
44.0Moderate
54.0Moderate
64.0Bright
74.0Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.4Bright
224.4Bright
234.4Bright
244.5Bright
254.5Bright
264.5Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
314.7Bright
Planning a trip in August

Hazard calendar for Cachoeiras de Macacu

In seasonPeak

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

Cachoeiras de Macacu'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 Cachoeiras de Macacu?

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

7.5
Sightseeing
2nd-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Cachoeiras de Macacu in August

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

In August, Cachoeiras de Macacu sees daytime highs around 24°C and nights near 14°C. Worth packing: light clothes. About 8 days see rain.

light clothes

UV index in Cachoeiras de Macacu in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cachoeiras de Macacu peaks around January 21 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 14Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep7Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Cachoeiras de Macacu 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 Cachoeiras de Macacu is worst in September — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Mar 1110 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr12Good
May15Moderate
Jun16Moderate
Jul15Moderate
Aug15Moderate
Sep19Moderate
Oct13Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Cachoeiras de Macacu?

Cachoeiras de Macacu sits at 22.5°S, 42.7°W, 63 m above sea level, in Brazil. The nearest listed city is Nova Friburgo, 24 km away.

Topography around Cachoeiras de Macacu

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

Within 3 km, the terrain around Cachoeiras de Macacu has large variations in elevation — a maximum elevation change of 710 m around an average of 239 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,264 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Cachoeiras de Macacu is covered by trees (80%) within 3 km, trees (86%) within 16 km, and trees (46%) and grassland (33%) within 80 km.

3 km
710 m
16 km
2,264 m
80 km
2,252 m
treesgrasslandartificial surfaceswaterwetland
August weather nearby: Nova Friburgo 24 km · Rio Bonito 28 km · Tanguá 30 km · São Pedro 32 km · Teresópolis 34 km · Silva Jardim 34 km · Guapimirim 35 km · Itaboraí 38 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 Cachoeiras de Macacu (-22.4625°, -42.6531°, elevation 63 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).