Cô Tô in Spring
In spring (March, April and May), Cô Tô sees average daytime highs around 33°C and overnight lows near 26°C, with 331 mm of rain over about 47 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.
Across spring, daytime highs hold fairly steady around 33°C. The sky is clear or mostly clear about 20% of the time across spring, and the air most often feels miserable.
Spring is Cô Tô's 3rd-best season to visit on our travel score. For the whole year in context, see Cô Tô's year-round climate.
- Avg daytime high
- 33°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 331 mm
- 47 wet days
- Avg wind
- 9 km/h
- Travel score
- 2.8
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Cô Tô in Spring
Across spring, daytime highs hold fairly steady around 33°C.
A typical spring day in Cô Tô reaches about 33°C and drops to 26°C overnight. The warmest of the three months is April, the coolest March.
How spring really feels in Cô Tô
Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cô Tô weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 23° | 26 | 4.9 | 11.5 | 5.1 |
| Feb | 32° / 23° | 15 | 2.6 | 11.7 | 4.7 |
| Mar | 33° / 25° | 47 | 7.2 | 11.9 | 3.5 |
| Apr | 34° / 26° | 97 | 15 | 12.2 | 2.6 |
| May | 33° / 27° | 187 | 25.2 | 12.5 | 2.3 |
| Jun | 31° / 26° | 231 | 26.6 | 12.6 | 2.6 |
| Jul | 30° / 26° | 237 | 27.8 | 12.5 | 2.7 |
| Aug | 30° / 26° | 225 | 28.8 | 12.3 | 2.6 |
| Sep | 30° / 26° | 267 | 27.5 | 12.1 | 2.6 |
| Oct | 31° / 25° | 315 | 27.6 | 11.8 | 2.6 |
| Nov | 31° / 24° | 139 | 16.9 | 11.5 | 3.5 |
| Dec | 31° / 24° | 62 | 9 | 11.4 | 4.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 20% of the time across spring.
Chance of precipitation in Spring
Cô Tô gets around 331 mm of rain over 47 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 9 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 48 min in early March to 12 h 36 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 5.8 kWh/m².
Hazard calendar for Cô Tô
In spring, Cô Tô overlaps 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.
Is spring a good time to visit Cô Tô?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Cô Tô.
What to pack for Cô Tô in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Cô Tô sees daytime highs around 33°C and nights near 26°C. Pack light clothes, rain gear and sun protection. About 47 days see rain.
Sea temperature near Cô Tô in Spring
The nearest coast averages about 30°C across spring — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 29 | 30 | 31 | 30 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 31 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Cô Tô in Spring
Clear-sky midday UV across spring averages around 12 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 11 | 12 | 12 | 11 | 11 | 12 | 13 | 13 | 10 | 9 | 9 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 11 | Extreme |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 11 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 10 | Very high |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Cô Tô in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 55 | 49 | 44 | 40 | 33 | 25 | 24 | 21 | 27 | 39 | 47 | 48 |
| Level | Poor | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 55 | Poor |
| Feb | 49 | Poor |
| Mar | 44 | Poor |
| Apr | 40 | Poor |
| May | 33 | Moderate |
| Jun | 25 | Moderate |
| Jul | 24 | Moderate |
| Aug | 21 | Moderate |
| Sep | 27 | Moderate |
| Oct | 39 | Poor |
| Nov | 47 | Poor |
| Dec | 48 | Poor |
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.
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
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.