Ít Ong in Spring
In spring (March, April and May), Ít Ong sees average daytime highs around 28°C and overnight lows near 19°C, with 170 mm of rain over about 30 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 25°C in early March to 29°C by late May. The sky is clear or mostly clear about 39% of the time across spring, and the air most often feels muggy.
Spring is Ít Ong's 3rd-best season to visit on our travel score. For the whole year in context, see Ít Ong's year-round climate.
- Avg daytime high
- 28°C
- 2nd-warmest season
- Avg overnight low
- 19°C
- Rainfall
- 170 mm
- 30 wet days
- Avg wind
- 5 km/h
- Travel score
- 6.2
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Ít Ong in Spring
Over the season highs climb from about 25°C in early March to 29°C by late May.
A typical spring day in Ít Ong reaches about 28°C and drops to 19°C overnight. The warmest of the three months is May, the coolest March.
Ít Ong 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 | 20° / 12° | 26 | 3.8 | 10.8 | 7.4 |
| Feb | 23° / 13° | 16 | 3.2 | 11.3 | 8.1 |
| Mar | 26° / 16° | 26 | 5 | 11.8 | 7.8 |
| Apr | 28° / 19° | 35 | 8 | 12.5 | 6.3 |
| May | 29° / 21° | 109 | 16.5 | 13 | 4.5 |
| Jun | 28° / 22° | 244 | 23.8 | 13.3 | 3.6 |
| Jul | 28° / 22° | 397 | 25.6 | 13.2 | 3.8 |
| Aug | 28° / 22° | 428 | 26.2 | 12.7 | 3.7 |
| Sep | 28° / 21° | 235 | 20.8 | 12.1 | 4.5 |
| Oct | 26° / 19° | 61 | 9.4 | 11.5 | 6.7 |
| Nov | 24° / 16° | 28 | 3.7 | 11 | 8.1 |
| Dec | 21° / 12° | 23 | 3.5 | 10.7 | 7.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 39% of the time across spring.
Chance of precipitation in Spring
Ít Ong gets around 170 mm of rain over 30 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 5 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 30 min in early March to 13 h 12 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 5.0 kWh/m².
Hazard calendar for Ít Ong
None of Ít Ong's seasonal hazards peak in spring. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Ít Ong's monsoon runs June–September, when most of the year's rain falls.
Is spring a good time to visit Ít Ong?
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 reasonable time to visit Ít Ong for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Ít Ong in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Ít Ong sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.
UV index in Ít Ong in Spring
Clear-sky midday UV across spring averages 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 Ít Ong peaks around June 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (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) | 7 | 9 | 12 | 10 | 11 | 14 | 13 | 13 | 9 | 9 | 8 | 6 |
| Level | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 7 | High |
| Feb | 9 | Very high |
| Mar | 12 | Extreme |
| Apr | 10 | Very high |
| May | 11 | Extreme |
| Jun | 14 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 9 | Very high |
| Oct | 9 | Very high |
| Nov | 8 | Very high |
| Dec | 6 | High |
Air quality in Ít Ong 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 Ít Ong is worst in April — around 70 µg/m³ PM2.5 (unhealthy), about 4.5× the cleanest month (July, 16 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) | 43 | 48 | 64 | 70 | 34 | 18 | 16 | 17 | 23 | 30 | 37 | 42 |
| Level | Poor | Poor | Unhealthy | Unhealthy | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 43 | Poor |
| Feb | 48 | Poor |
| Mar | 64 | Unhealthy |
| Apr | 70 | Unhealthy |
| May | 34 | Moderate |
| Jun | 18 | Moderate |
| Jul | 16 | Moderate |
| Aug | 17 | Moderate |
| Sep | 23 | Moderate |
| Oct | 30 | Moderate |
| Nov | 37 | Poor |
| Dec | 42 | Poor |
Where is Ít Ong?
Ít Ong sits at 21.5°N, 104.0°E, 206 m above sea level, in Vietnam. The nearest listed city is Sơn La, 24 km away.
Topography around Ít Ong
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ít Ong.
Within 3 km, the terrain around Ít Ong has large variations in elevation — a maximum elevation change of 913 m around an average of 362 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,314 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,884 m.
The land around Ít Ong is covered by trees (52%) and grassland (33%) within 3 km, trees (64%) and grassland (27%) within 16 km, and trees (72%) and grassland (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 Ít Ong (21.5175°, 104.027°, elevation 206 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.