Oiapoque weather in August

In August, Oiapoque sees average daytime highs of 31°C and overnight lows near 23°C, with 94 mm of rain across 15.6 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 46% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of August to 12 h 06 min by month's end. Set against the rest of the year, August is Oiapoque's 3rd-clearest and 9th-windiest month. For the whole year in context, see Oiapoque's year-round climate.

Daytime high
31°
4th warmest
Overnight low
23°
2nd coldest
Rainfall
94 mm
15.6 wet days
Daylight
12 h 06 min
6:28 AM – 6:35 PM
Cloud cover
46%
3rd clearest
Wind
7 km/h
9th windiest
Solar energy
5.4 kWh/m²
Travel score
4.0
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical August day in Oiapoque reaches about 31°C in the afternoon and slips back to 23°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163123
173123
183123
193123
203123
213223
223223
233223
243223
253223
263223
273223
283223
293223
303223
313223

How August really feels in Oiapoque

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.

Oiapoque weather by month

How August compares with the rest of the year at a glance. August is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°28426.911.83.4
Feb29° / 23°26222.811.93.5
Mar29° / 23°21323.6123.5
Apr29° / 23°27125.112.13.2
May29° / 23°38129.112.22.9
Jun30° / 23°27627.312.23.0
Jul30° / 23°19025.112.23.4
Aug31° / 23°9415.612.14.0
Sep33° / 23°367.1124.1
Oct33° / 23°418.211.93.7
Nov32° / 23°10616.411.83.4
Dec30° / 23°2342611.83.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 27% of August, with mostly cloudy or overcast conditions the remaining 26%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36535
46535
56634
66733
76733
86832
96832
106931
117030
127129
137129
147228
157327
167327
177525
187525
197624
207723
217822
227822
238020
248020
258218
268218
278317
288317
298317
308416
318416

Chance of precipitation in August

Any precipitation

Oiapoque gets around 94 mm of rain over 15.6 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 51% and peaks near 67% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
167
266
365
464
563
662
762
861
960
1059
1158
1257
1356
1455
1554
1653
1752
1851
1949
2048
2146
2244
2343
2441
2539
2637
2736
2834
2932
3031
3130

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
10964
20964
30955
40955
50955
60955
70955
80955
90946
100946
110946
120946
130946
140946
150946
160946
170946
180946
190946
200946
210946
220946
230946
240955
250955
260955
270964
280964
290964
300973
311963

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 6 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
16calm
26calm
36calm
46calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 12 min at the start of August to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over August. Sunrise moves from 6:28 AM to 6:25 AM, and sunset from 6:38 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:286:38
212.26:286:38
312.26:286:38
412.26:286:38
512.26:286:38
612.26:286:38
712.26:286:37
812.26:286:37
912.16:286:37
1012.16:286:37
1112.16:286:37
1212.16:286:36
1312.16:286:36
1412.16:286:36
1512.16:286:36
1612.16:286:35
1712.16:286:35
1812.16:276:35
1912.16:276:34
2012.16:276:34
2112.16:276:34
2212.16:276:33
2312.16:276:33
2412.16:266:33
2512.16:266:32
2612.16:266:32
2712.16:266:31
2812.16:266:31
2912.16:256:31
3012.16:256:30
3112.16:256:30

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.4 kWh/m².

For context, solar energy here swings from a low near 3.68 kWh/m² to a high of 6 kWh/m² in September across the year — August's 5.4 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.5Bright
205.5Bright
215.5Bright
225.6Bright
235.6Bright
245.6Bright
255.7Bright
265.7Bright
275.7Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in August

Is August a good time to visit Oiapoque?

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

4.0
Sightseeing
2nd-best month of the year
6.0
Beach & pool
3rd-best month of the year

August is a reasonable time to visit Oiapoque for sightseeing.

What to pack for Oiapoque in August

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

In August, Oiapoque sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

Sea temperature near Oiapoque in August

The nearest coast averages about 29°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 October at about 29°C and coldest in February near 27°C.

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

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr28Warm
May28Warm
Jun28Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Oiapoque in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oiapoque peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 12UV 14Nov 23UV 11
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Oiapoque 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 Oiapoque is worst in February — around 26 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (August, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 1925 µg/m³Aug 117 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb26Moderate
Mar25Moderate
Apr23Moderate
May15Moderate
Jun9Good
Jul7Good
Aug7Good
Sep8Good
Oct10Good
Nov11Good
Dec18Moderate
Location & terrain

Where is Oiapoque?

Oiapoque sits at 3.8°N, 51.8°W, 18 m above sea level, in Brazil. The nearest listed city is Matoury, 124 km away.

Saint-Laurent-du-MaroniPorto GrandeBlauwgrondRainville

Topography around Oiapoque

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

Within 3 km, the terrain around Oiapoque has only modest variations in elevation — a maximum elevation change of 97 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 124 m; within 80 km, significant variations in elevation — a maximum elevation change of 482 m.

The land around Oiapoque is covered by trees (72%) within 3 km, trees (93%) within 16 km, and trees (75%) within 80 km.

3 km
97 m
16 km
124 m
80 km
482 m
treesgrasslandartificial surfaceswaterwetlandmangroves
August weather nearby: Matoury 124 km · Rémire-Montjoly 129 km · Cayenne 134 km · Kourou 172 km · Saint-Laurent-du-Maroni 305 km · Porto Grande 351 km · Blauwgrond 426 km · Rainville 428 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 Oiapoque (3.8431°, -51.835°, elevation 18 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).