Jacareí weather in August

In August, Jacareí sees average daytime highs of 24°C and overnight lows near 13°C, with 35 mm of rain across 5.2 wet days and about 11.2 hours of daylight. It is the 9th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 25°C by the end. The sky is clear or mostly clear about 53% 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 Jacareí's 1st-clearest and 4th-windiest month. For the whole year in context, see Jacareí's year-round climate.

Daytime high
24°
9th warmest
Overnight low
13°
3rd coldest
Rainfall
35 mm
5.2 wet days
Daylight
11 h 12 min
7:32 AM – 6:44 PM
Cloud cover
44%
1st clearest
Wind
8 km/h
4th windiest
Solar energy
4.36 kWh/m²
Travel score
7.9
out of 10

Jacareí is human settlement in Brazil.

Air quality
Good
PM10 24 µg/m³ · 2016

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 23°C in the first days to 25°C by the end.

A typical August day in Jacareí reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°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 about 1°C warmer than July and about 1°C cooler than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12312
22312
32312
42312
52412
62412
72412
82413
92413
102413
112413
122413
132413
142413
152413
162413
172413
182413
192413
202413
212513
222513
232513
242513
252513
262513
272514
282514
292514
302514
312514

Jacareí 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
Jan28° / 20°22622.113.34.4
Feb28° / 20°17118.512.84.3
Mar28° / 19°13918.112.25.2
Apr26° / 17°579.511.56.7
May24° / 15°577.610.97.3
Jun23° / 13°385.110.67.8
Jul23° / 12°445.110.77.8
Aug24° / 13°355.211.27.9
Sep25° / 15°769.911.96.8
Oct26° / 17°10913.612.55.9
Nov27° / 18°14216.613.15.4
Dec28° / 19°17220.113.44.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of August, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36139
46139
56139
66139
76139
86139
96238
106139
116238
126238
136238
146337
156337
166436
176337
186436
196436
206535
216535
226535
236535
246535
256634
266634
276535
286535
296535
306436
316436

Chance of precipitation in August

Any precipitation

Jacareí gets around 35 mm of rain over 5.2 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 18% and peaks near 21% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
117
217
317
417
517
617
717
817
917
1017
1117
1217
1317
1417
1517
1617
1717
1817
1917
2017
2117
2217
2317
2417
2518
2618
2719
2819
2920
3020
3121

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 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
153425
251436
351436
451436
551436
650437
750437
849437
949438
1049438
1148439
1248439
1348439
14484310
15474310
16474310
17474310
18464310
19454411
20444511
21434611
22424711
23404812
24394912
25384913
26375013
27365014
28355015
29345115
30335116
31325117

Wind in August

Winds average 8 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 7:43 AM to 7:19 AM, and sunset from 6:37 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:436:37
210.97:426:38
310.97:416:38
411.07:416:39
511.07:406:39
611.07:406:39
711.07:396:40
811.07:386:40
911.17:386:41
1011.17:376:41
1111.17:366:42
1211.17:356:42
1311.17:356:42
1411.17:346:43
1511.27:336:43
1611.27:326:44
1711.27:326:44
1811.27:316:44
1911.27:306:45
2011.37:296:45
2111.37:286:45
2211.37:276:46
2311.37:266:46
2411.47:256:47
2511.47:256:47
2611.47:246:47
2711.47:236:48
2811.47:226:48
2911.57:216:48
3011.57:206:49
3111.57:196:49

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.36 kWh/m².

For context, solar energy here swings from a low near 3.39 kWh/m² to a high of 5.52 kWh/m² in December across the year — August's 4.36 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
44.0Moderate
54.0Bright
64.0Bright
74.1Bright
84.1Bright
94.1Bright
104.2Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.4Bright
204.5Bright
214.5Bright
224.5Bright
234.6Bright
244.6Bright
254.6Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.8Bright
Planning a trip in August

Hazard calendar for Jacareí

In seasonPeak

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

Jacareí'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 Jacareí?

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

7.9
Sightseeing
1st-best month of the year
6.8
Beach & pool
1st-best month of the year

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

What to pack for Jacareí in August

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

In August, Jacareí sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes. About 5 days see rain.

light clothes

Sea temperature near Jacareí 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 64 km away) is warmest in February at about 27°C and coldest in August near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Jacareí 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 Jacareí peaks around February 8 at about 15 (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 highExtremeFeb 8UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Jacareí 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 Jacareí is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2132 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar19Moderate
Apr21Moderate
May27Moderate
Jun32Moderate
Jul31Moderate
Aug28Moderate
Sep28Moderate
Oct20Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Jacareí?

Jacareí sits at 23.3°S, 46.0°W, 574 m above sea level, in Brazil. The nearest listed city is Guararema, 14 km away.

Topography around Jacareí

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

Within 3 km, the terrain around Jacareí has only modest variations in elevation — a maximum elevation change of 129 m around an average of 589 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 295 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,071 m.

The land around Jacareí is covered by artificial surfaces (54%), trees (21%) and grassland (20%) within 3 km, grassland (44%) and trees (37%) within 16 km, and trees (52%) and grassland (26%) within 80 km.

3 km
129 m
16 km
295 m
80 km
2,071 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Guararema 14 km · São José dos Campos 16 km · Santa Isabel 26 km · Salesópolis 28 km · Biritiba Mirim 31 km · Paraibuna 32 km · Mogi das Cruzes 33 km · Caçapava 35 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 Jacareí (-23.3053°, -45.9658°, elevation 574 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).