Guapimirim weather in August

In August, Guapimirim sees average daytime highs of 24°C and overnight lows near 15°C, with 49 mm of rain across 7.5 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 Guapimirim's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Guapimirim's year-round climate.

Daytime high
24°
10th warmest
Overnight low
15°
2nd coldest
Rainfall
49 mm
7.5 wet days
Daylight
11 h 12 min
7:20 AM – 6:33 PM
Cloud cover
47%
2nd clearest
Wind
5 km/h
2nd windiest
Solar energy
4.21 kWh/m²
Travel score
7.5
out of 10

Guapimirim is human settlement in Brazil.

Air quality
Good
PM10 16 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 24°C through the month.

A typical August day in Guapimirim reaches about 24°C in the afternoon and slips back to 15°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 29°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)
12414
22414
32414
42415
52415
62415
72415
82415
92415
102415
112415
122415
132415
142415
152415
162415
172415
182415
192415
202415
212415
222415
232415
242515
252515
262515
272515
282515
292515
302516
312516

Guapimirim 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
Jan29° / 21°32823.313.23.8
Feb29° / 21°24218.712.84.0
Mar28° / 20°25922.212.24.3
Apr27° / 19°11915.311.55.7
May24° / 16°8011.410.96.8
Jun24° / 15°497.410.67.6
Jul24° / 14°487.210.87.6
Aug24° / 15°497.511.27.5
Sep25° / 16°1021211.96.6
Oct26° / 18°1501612.55.6
Nov26° / 19°27220.713.14.7
Dec28° / 20°32323.613.44.2

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 15% of August, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26040
36040
46040
56040
66040
76040
86040
95941
105941
115941
125941
135941
145941
155941
165941
175941
186040
196040
206040
216040
226139
236040
246040
256139
266139
276139
286139
296139
306139
316139

Chance of precipitation in August

Any precipitation

Guapimirim gets around 49 mm of rain over 7.5 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 29% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
123
224
324
424
524
624
725
825
925
1025
1125
1225
1325
1425
1525
1625
1725
1825
1925
2025
2125
2225
2325
2425
2525
2626
2726
2827
2927
3028
3129

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 47% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11848322
21848322
31848322
41848322
51848322
61748322
71748322
81748323
91748323
101748323
111748323
121748323
131748323
141748323
151748323
161748323
171749323
181648333
191648333
201648343
211547353
221447363
231446373
241346383
251245393
261244403
271144414
281143424
291142434
301141445
311041445

Wind in August

Winds average 5 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
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
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 7:29 AM to 7:06 AM, and sunset from 6:27 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:296:27
211.07:296:27
311.07:286:27
411.07:286:28
511.07:276:28
611.07:276:29
711.17:266:29
811.17:256:29
911.17:256:30
1011.17:246:30
1111.17:236:31
1211.17:236:31
1311.27:226:31
1411.27:216:32
1511.27:206:32
1611.27:206:33
1711.27:196:33
1811.37:186:33
1911.37:176:34
2011.37:166:34
2111.37:156:34
2211.37:156:35
2311.47:146:35
2411.47:136:35
2511.47:126:36
2611.47:116:36
2711.47:106:36
2811.57:096:37
2911.57:086:37
3011.57:076:37
3111.57:066:38

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.21 kWh/m².

For context, solar energy here swings from a low near 3.39 kWh/m² to a high of 5.92 kWh/m² in February across the year — August's 4.21 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
64.0Moderate
74.0Moderate
84.0Bright
94.0Bright
104.0Bright
114.1Bright
124.1Bright
134.1Bright
144.1Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.4Bright
244.4Bright
254.4Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.6Bright
Planning a trip in August

Hazard calendar for Guapimirim

In seasonPeak

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

Guapimirim'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 Guapimirim?

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

7.5
Sightseeing
3rd-best month of the year
6.5
Beach & pool
1st-best month of the year

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

What to pack for Guapimirim in August

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

In August, Guapimirim sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Guapimirim 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 66 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 Guapimirim 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 Guapimirim 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 Guapimirim 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 Guapimirim 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 Guapimirim?

Guapimirim sits at 22.5°S, 43.0°W, 33 m above sea level, in Brazil. The nearest listed city is São Pedro, 13 km away.

Topography around Guapimirim

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

Within 3 km, the terrain around Guapimirim has significant variations in elevation — a maximum elevation change of 480 m around an average of 97 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,243 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,252 m.

The land around Guapimirim is covered by trees (74%) within 3 km, trees (71%) and grassland (22%) within 16 km, and trees (47%) and grassland (29%) within 80 km.

3 km
480 m
16 km
2,243 m
80 km
2,252 m
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: São Pedro 13 km · Teresópolis 13 km · Magé 14 km · Petrópolis 21 km · Itaboraí 26 km · Cachoeiras de Macacu 35 km · Tanguá 35 km · Niterói 40 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 Guapimirim (-22.5372°, -42.9819°, elevation 33 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).