Oeiras weather in August

In August, Oeiras sees average daytime highs of 35°C and overnight lows near 24°C, with 0 mm of rain across 0.1 wet days and about 11.8 hours of daylight. It is the 4th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 76% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 11 h 42 min at the start of August to 11 h 54 min by month's end. Set against the rest of the year, August is Oeiras's 1st-clearest and 1st-windiest month. For the whole year in context, see Oeiras's year-round climate.

Daytime high
35°
4th warmest
Overnight low
24°
5th coldest
Rainfall
0 mm
0.1 wet days
Daylight
11 h 48 min
6:00 AM – 5:46 PM
Cloud cover
24%
1st clearest
Wind
15 km/h
1st windiest
Solar energy
6.26 kWh/m²
Travel score
3.4
out of 10

Oeiras 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 35°C through the month.

A typical August day in Oeiras reaches about 35°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 37°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183524
193524
203524
213524
223524
233524
243524
253524
263624
273624
283624
293624
303624
313624

How August really feels in Oeiras

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Oeiras weather by month

How August compares with the rest of the year at a glance. August is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°16519.712.43.0
Feb32° / 23°16618.212.23.1
Mar32° / 23°16120.5123.2
Apr32° / 24°9013.211.83.6
May33° / 24°334.811.73.8
Jun33° / 24°30.511.64.2
Jul34° / 23°20.411.64.1
Aug35° / 24°00.111.83.4
Sep36° / 25°10.2122.4
Oct37° / 27°14212.22.0
Nov35° / 26°446.212.32.5
Dec34° / 25°8110.712.42.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 76% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18713
28713
38713
48812
58812
68812
78812
88812
98911
108911
118911
128911
138911
148911
158911
168911
178812
188812
198812
208812
218812
228812
238911
248911
258911
268911
278911
289010
299010
309010
319010

Chance of precipitation in August

Any precipitation

Oeiras gets around 0 mm of rain over 0.1 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 0% and peaks near 1% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310

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 61% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1556363
2557353
3558343
4558343
5559333
6658333
7659323
8659323
9660313
10661312
11661312
12562312
13562312
14561322
15562312
16563311
17563311
18563311
19563311
20563311
21563311
22564301
23564301
24564301
25664291
26664291
27665281
28764281
29764281
30863281
31862282

Wind in August

Winds average 15 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 42 min at the start of August to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over August. Sunrise moves from 6:04 AM to 5:53 AM, and sunset from 5:45 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:045:45
211.76:045:45
311.76:035:45
411.76:035:45
511.76:035:46
611.76:035:46
711.76:035:46
811.76:025:46
911.76:025:46
1011.76:025:46
1111.76:015:46
1211.76:015:46
1311.86:015:46
1411.86:005:46
1511.86:005:46
1611.86:005:46
1711.85:595:46
1811.85:595:46
1911.85:585:46
2011.85:585:45
2111.85:585:45
2211.85:575:45
2311.85:575:45
2411.85:565:45
2511.85:565:45
2611.85:555:45
2711.85:555:45
2811.85:545:45
2911.85:545:45
3011.95:535:44
3111.95:535:44

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.26 kWh/m².

For context, solar energy here swings from a low near 4.96 kWh/m² to a high of 6.77 kWh/m² in September across the year — August's 6.26 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
36.0Bright
46.0Bright
56.0Intense
66.0Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
316.6Intense
Planning a trip in August

Hazard calendar for Oeiras

In seasonPeak

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

Oeiras's rainy season runs December–April, 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 Oeiras?

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

3.4
Sightseeing
5th-best month of the year
7.2
Beach & pool
3rd-best month of the year

August is a weaker month for outdoor sightseeing in Oeiras. The water and warmth also suit a beach or pool day.

What to pack for Oeiras in August

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

In August, Oeiras sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Oeiras in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oeiras peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Oeiras?

Oeiras sits at 7.0°S, 42.1°W, 181 m above sea level, in Brazil. The nearest listed city is Picos, 74 km away.

Topography around Oeiras

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

Within 3 km, the terrain around Oeiras has only modest variations in elevation — a maximum elevation change of 114 m around an average of 196 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 173 m; within 80 km, significant variations in elevation — a maximum elevation change of 468 m.

The land around Oeiras is covered by shrubs (53%) within 3 km, shrubs (68%) and trees (24%) within 16 km, and shrubs (56%) and trees (33%) within 80 km.

3 km
114 m
16 km
173 m
80 km
468 m
treesshrubsgrasslandcroplandartificial surfaces
August weather nearby: Picos 74 km · Valença do Piauí 81 km · Floriano 103 km · Barão de Grajaú 103 km · Regeneração 108 km · Jaicós 116 km · Amarante 117 km · Água Branca 138 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 Oeiras (-7.0253°, -42.1311°, elevation 181 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).