Cô Tô weather in August

In August, Cô Tô sees average daytime highs of 30°C and overnight lows near 26°C, with 225 mm of rain across 28.8 wet days and about 12.3 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 1% of the time in August, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of August to 12 h 12 min by month's end. Set against the rest of the year, August is Cô Tô's 11th-clearest and 1st-windiest month. For the whole year in context, see Cô Tô's year-round climate.

Daytime high
30°
11th warmest
Overnight low
26°
9th coldest
Rainfall
225 mm
28.8 wet days
Daylight
12 h 18 min
5:54 AM – 6:14 PM
Cloud cover
90%
11th clearest
Wind
14 km/h
1st windiest
Solar energy
4.69 kWh/m²
Travel score
2.6
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical August day in Cô Tô reaches about 30°C in the afternoon and slips back to 26°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 32°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)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183026
193026
203026
213026
223026
233026
243026
253026
263126
273126
283126
293126
303126
313126

How August really feels in Cô Tô

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.

Cô Tô weather by month

How August compares with the rest of the year at a glance. August is the 11th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°264.911.55.1
Feb32° / 23°152.611.74.7
Mar33° / 25°477.211.93.5
Apr34° / 26°971512.22.6
May33° / 27°18725.212.52.3
Jun31° / 26°23126.612.62.6
Jul30° / 26°23727.812.52.7
Aug30° / 26°22528.812.32.6
Sep30° / 26°26727.512.12.6
Oct31° / 25°31527.611.82.6
Nov31° / 24°13916.911.53.5
Dec31° / 24°62911.44.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 5% of August, with mostly cloudy or overcast conditions the remaining 94%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3694
4694
5694
6694
7694
8793
9892
10892
11892
12892
13892
14892
15892
16793
17793
18793
19793
20793
21595
22595
23595
24595
25496
26496
27496
28496
29496
30595
31595

Chance of precipitation in August

Any precipitation

Cô Tô gets around 225 mm of rain over 28.8 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 92% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
191
291
391
491
591
691
791
891
991
1091
1191
1291
1391
1491
1591
1692
1792
1892
1993
2093
2193
2293
2394
2493
2593
2693
2793
2893
2993
3092
3192

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1892
2892
3892
4892
5892
6892
7892
8892
9892
10892
11892
12892
13892
14892
15892
16892
17892
18892
19892
20892
21892
22892
23892
24892
25892
26892
27892
28892
29892
30892
31892

Wind in August

Winds average 14 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 30 min at the start of August to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over August. Sunrise moves from 5:52 AM to 5:54 AM, and sunset from 6:20 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:526:20
212.55:526:20
312.45:526:19
412.45:536:19
512.45:536:19
612.45:536:18
712.45:536:18
812.45:536:18
912.45:536:17
1012.45:536:17
1112.45:536:16
1212.45:536:16
1312.45:546:16
1412.45:546:15
1512.45:546:15
1612.35:546:14
1712.35:546:14
1812.35:546:13
1912.35:546:13
2012.35:546:12
2112.35:546:12
2212.35:546:11
2312.35:546:11
2412.35:546:10
2512.35:546:10
2612.35:546:09
2712.25:546:09
2812.25:546:08
2912.25:546:07
3012.25:546:07
3112.25:546:06

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.69 kWh/m².

For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 6.1 kWh/m² in April across the year — August's 4.69 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Cô Tô

In seasonPeak

In August, Cô Tô sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Cô Tô sits in the Pacific typhoon belt; the season peaks July–October.

Cô Tô's rainy season runs May–October, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Cô Tô?

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

2.6
Sightseeing
7th-best month of the year
3.7
Beach & pool
11th-best month of the year

August is a weaker month for outdoor sightseeing in Cô Tô.

What to pack for Cô Tô in August

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

In August, Cô Tô sees daytime highs around 30°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Cô Tô 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 29 km away) is warmest in May at about 31°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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Cô Tô in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cô Tô peaks around August 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 19UV 13Dec 11UV 9
UV index (midday)Level
Jan10Extreme
Feb11Extreme
Mar12Extreme
Apr12Extreme
May11Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Cô Tô 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 Cô Tô is worst in January — around 55 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (August, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1754 µg/m³Aug 1422 µg/m³
PM2.5 (µg/m³)Level
Jan55Poor
Feb49Poor
Mar44Poor
Apr40Poor
May33Moderate
Jun25Moderate
Jul24Moderate
Aug21Moderate
Sep27Moderate
Oct39Poor
Nov47Poor
Dec48Poor
Location & terrain

Where is Cô Tô?

Cô Tô sits at 10.3°N, 105.0°E, 1 m above sea level, in Vietnam. The nearest listed city is Óc Eo, 19 km away.

Topography around Cô Tô

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

Within 3 km, the terrain around Cô Tô has significant variations in elevation — a maximum elevation change of 413 m around an average of 15 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 633 m; within 80 km, large variations in elevation — a maximum elevation change of 691 m.

The land around Cô Tô is covered by cropland (76%) within 3 km, cropland (79%) within 16 km, and cropland (61%) and water (23%) within 80 km.

3 km
413 m
16 km
633 m
80 km
691 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Óc Eo 19 km · Tịnh Biên 29 km · Núi Sập 29 km · Rạch Giá 38 km · Châu Đốc 40 km · Châu Phong 43 km · Vĩnh Thạnh 44 km · Kiến An 45 km

Vietnam travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / F
220 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,066
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
59%
of population, 2024
Homicide rate
1.5
per 100k, 2011
Road deaths
30.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 500
Religion
none 86%Catholic 6%Buddhist 6%Protestant 1%

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 Cô Tô (10.35°, 105.0167°, elevation 1 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).