Piraí weather in August

In August, Piraí sees average daytime highs of 25°C and overnight lows near 16°C, with 37 mm of rain across 7 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 25°C through the month. The sky is clear or mostly clear about 46% of the time in August, and the air most often feels comfortable.

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 Piraí's 1st-clearest and 3rd-windiest month. For the whole year in context, see Piraí's year-round climate.

Daytime high
25°
9th warmest
Overnight low
16°
2nd coldest
Rainfall
37 mm
7 wet days
Daylight
11 h 12 min
7:23 AM – 6:36 PM
Cloud cover
47%
1st clearest
Wind
6 km/h
3rd windiest
Solar energy
4.21 kWh/m²
Travel score
7.5
out of 10

Piraí 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 25°C through the month.

A typical August day in Piraí reaches about 25°C in the afternoon and slips back to 16°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 30°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52515
62515
72515
82515
92515
102515
112515
122515
132515
142515
152515
162516
172516
182516
192516
202516
212516
222516
232516
242516
252516
262516
272616
282616
292616
302616
312616

How August really feels in Piraí

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.

Piraí 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
Jan29° / 22°30923.513.23.6
Feb30° / 22°2221912.83.8
Mar29° / 21°22522.612.24.1
Apr27° / 19°11714.511.55.8
May25° / 17°7011.310.96.7
Jun24° / 16°406.710.67.6
Jul24° / 15°427.410.87.7
Aug25° / 16°37711.27.5
Sep26° / 17°8111.811.96.4
Oct27° / 19°12015.612.55.5
Nov27° / 20°20020.413.14.7
Dec28° / 21°25223.213.44.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
25941
35941
45941
55941
65941
75941
85941
95941
105941
115941
125941
135941
145941
156040
166040
176040
186139
196139
206139
216139
226139
236238
246238
256238
266238
276139
286139
296139
306139
316139

Chance of precipitation in August

Any precipitation

Piraí gets around 37 mm of rain over 7 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 23% and peaks near 28% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
122
221
321
421
521
621
721
821
921
1021
1121
1221
1321
1422
1522
1622
1722
1823
1923
2023
2124
2224
2325
2425
2526
2626
2726
2827
2927
3028
3128

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11744372
21744373
31644373
41644373
51644363
61644363
71645364
81645364
91645354
101645354
111645354
121645354
131645354
141645354
151645354
161645354
171645354
181645364
191545363
201545373
211444383
221444393
231343403
241243414
251242424
261142434
271141444
281141445
291040455
301040455
311039456

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 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
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
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 7:33 AM to 7:10 AM, and sunset from 6:30 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:336:30
211.07:336:31
311.07:326:31
411.07:326:31
511.07:316:32
611.07:306:32
711.07:306:33
811.17:296:33
911.17:286:33
1011.17:286:34
1111.17:276:34
1211.17:266:35
1311.27:266:35
1411.27:256:35
1511.27:246:36
1611.27:236:36
1711.27:236:36
1811.37:226:37
1911.37:216:37
2011.37:206:38
2111.37:196:38
2211.37:186:38
2311.47:176:39
2411.47:176:39
2511.47:166:39
2611.47:156:40
2711.47:146:40
2811.57:136:40
2911.57:126:41
3011.57:116:41
3111.57:106:41

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 3.36 kWh/m² to a high of 5.81 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
23.8Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
74.0Moderate
84.0Moderate
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
314.5Bright
Planning a trip in August

Hazard calendar for Piraí

In seasonPeak

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

Piraí'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 Piraí?

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
6.7
Beach & pool
1st-best month of the year

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

What to pack for Piraí in August

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

In August, Piraí sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Piraí 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 55 km away) is warmest in February 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°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Warm

UV index in Piraí 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 Piraí peaks around February 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 9UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep7High
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Piraí 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 Piraí is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 1332 µg/m³Dec 2115 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb16Moderate
Mar17Moderate
Apr19Moderate
May24Moderate
Jun29Moderate
Jul31Moderate
Aug27Moderate
Sep33Moderate
Oct20Moderate
Nov17Moderate
Dec15Moderate
Location & terrain

Where is Piraí?

Piraí sits at 22.6°S, 43.9°W, 381 m above sea level, in Brazil. The nearest listed city is Pinheiral, 17 km away.

Topography around Piraí

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

Within 3 km, the terrain around Piraí has only modest variations in elevation — a maximum elevation change of 209 m around an average of 430 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 806 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,556 m.

The land around Piraí is covered by trees (51%) and grassland (37%) within 3 km, trees (53%) and grassland (43%) within 16 km, and trees (43%), grassland (31%) and water (20%) within 80 km.

3 km
209 m
16 km
806 m
80 km
2,556 m
treesgrasslandartificial surfaceswater
August weather nearby: Pinheiral 17 km · Barra do Piraí 19 km · Paracambi 19 km · Mendes 20 km · Seropédica 23 km · Volta Redonda 24 km · Japeri 25 km · Universidade Rural 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 Piraí (-22.6292°, -43.8981°, elevation 381 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).