Kourou weather in August

In August, Kourou sees average daytime highs of 29°C and overnight lows near 25°C, with 90 mm of rain across 16.8 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 52% 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 Kourou's 2nd-clearest and 11th-windiest month. For the whole year in context, see Kourou's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
25°
6th coldest
Rainfall
90 mm
16.8 wet days
Daylight
12 h 12 min
6:30 AM – 6:40 PM
Cloud cover
44%
2nd clearest
Wind
12 km/h
11th windiest
Solar energy
5.81 kWh/m²
Travel score
4.8
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical August day in Kourou reaches about 29°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, August runs on par with July and on par with September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
22924
32924
42924
52924
62924
72925
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925
312925

How August really feels in Kourou

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.

Kourou weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 24°2362611.74.1
Feb27° / 24°19122.511.84.2
Mar28° / 25°16523.8124.3
Apr28° / 25°23625.312.14.0
May28° / 25°39228.912.23.6
Jun28° / 24°34628.712.33.4
Jul29° / 24°2042612.33.8
Aug29° / 25°9016.812.24.8
Sep29° / 25°4010125.5
Oct30° / 25°491211.95.2
Nov29° / 25°12820.411.84.2
Dec28° / 24°24426.911.73.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 24% of August, with mostly cloudy or overcast conditions the remaining 25%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26832
36832
46931
56931
67030
77129
87228
97228
107228
117327
127327
137426
147426
157525
167624
177624
187723
197723
207822
217822
227921
238020
248020
258119
268119
278218
288218
298218
308218
318218

Chance of precipitation in August

Any precipitation

Kourou gets around 90 mm of rain over 16.8 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 54% and peaks near 70% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
170
269
368
467
565
664
763
862
961
1061
1160
1259
1359
1458
1557
1656
1755
1854
1953
2052
2150
2249
2347
2446
2544
2643
2741
2840
2939
3038
3137

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 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
19010
29010
39010
48911
58911
68911
78911
88812
98812
108812
118812
128713
138713
148713
158713
168614
178614
188614
198515
208515
218515
228515
238416
248416
258416
268416
278317
288317
298317
308317
318218

Wind in August

Winds average 12 km/h in August.

Across August, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 6:30 AM to 6:27 AM, and sunset from 6:43 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:306:43
212.26:306:43
312.26:306:43
412.26:306:43
512.26:306:43
612.26:306:43
712.26:306:42
812.26:306:42
912.26:306:42
1012.26:306:42
1112.26:306:41
1212.26:306:41
1312.26:306:41
1412.26:306:40
1512.26:306:40
1612.26:306:40
1712.26:296:39
1812.26:296:39
1912.26:296:39
2012.26:296:38
2112.16:296:38
2212.16:296:38
2312.16:296:37
2412.16:296:37
2512.16:296:36
2612.16:286:36
2712.16:286:36
2812.16:286:35
2912.16:286:35
3012.16:286:34
3112.16:276:34

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.81 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.25 kWh/m² in September across the year — August's 5.81 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.9Bright
215.9Bright
225.9Bright
236.0Bright
246.0Bright
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in August

Hazard calendar for Kourou

In seasonPeak

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

Kourou's rainy season runs April–July, 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 Kourou?

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

4.8
Sightseeing
3rd-best month of the year
6.2
Beach & pool
3rd-best month of the year

August is a reasonable time to visit Kourou for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Kourou in August

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

In August, Kourou sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Kourou in August

The nearest coast averages about 28°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in July at about 28°C and coldest in January 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
Apr27Warm
May28Warm
Jun28Warm
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct28Tropical
Nov28Warm
Dec27Warm

UV index in Kourou 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 Kourou peaks around April 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 11UV 14Dec 11UV 10
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Kourou 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 Kourou is worst in February — around 28 µg/m³ PM2.5 (moderate), about 4.0× the cleanest month (August, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 1627 µg/m³Aug 157 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb28Moderate
Mar26Moderate
Apr26Moderate
May21Moderate
Jun12Moderate
Jul8Good
Aug7Good
Sep8Good
Oct10Good
Nov12Good
Dec21Moderate
Location & terrain

Where is Kourou?

Kourou sits at 5.2°N, 52.6°W, 7 m above sea level, in French Guiana. The nearest listed city is Cayenne, 42 km away.

CayenneMatouryRémire-MontjolySaint-Laurent-du-MaroniOiapoque

Topography around Kourou

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

Within 3 km, the terrain around Kourou has only modest variations in elevation — a maximum elevation change of 67 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 165 m; within 80 km, significant variations in elevation — a maximum elevation change of 403 m.

The land around Kourou is covered by water (45%) within 3 km, water (47%) and trees (34%) within 16 km, and trees (57%) and water (37%) within 80 km.

3 km
67 m
16 km
165 m
80 km
403 m
treesgrasslandartificial surfaceswaterwetlandmangroves
August weather nearby: Cayenne 42 km · Matoury 50 km · Rémire-Montjoly 50 km · Saint-Laurent-du-Maroni 158 km · Oiapoque 172 km · Blauwgrond 284 km · Rainville 286 km · Beekhuizen 289 km

French Guiana travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
220 V · 50 Hz

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 Kourou (5.1628°, -52.6427°, elevation 7 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).