Vientiane in Spring

In spring (March, April and May), Vientiane sees average daytime highs around 34°C and overnight lows near 24°C, with 372 mm of rain over about 42 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 34°C. The sky is clear or mostly clear about 39% of the time across spring, and the air most often feels oppressive.

Spring is Vientiane's 3rd-best season to visit on our travel score. For the whole year in context, see Vientiane's year-round climate.

Avg daytime high: 34°C; warmest season of the year
Avg overnight low: 24°C
Rainfall: 372 mm; 42 wet days
Avg wind: 6 km/h
Travel score: 2.7; 3rd-best season
Months: Mar · Apr · May

← Winter Vientiane year-round climate Summer →

Spring Summer Fall Winter

Temperature in Vientiane in Spring

Average highAverage lowShaded bands: 10–90% of days

Across spring, daytime highs hold fairly steady around 34°C.

A typical spring day in Vientiane reaches about 34°C and drops to 24°C overnight. The warmest of the three months is April, the coolest March.

How spring really feels in Vientiane

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.

Days feeling ≥ 32°C

56 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Vientiane 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	29° / 17°	11	1.7	11	6.9
Feb	31° / 19°	15	2.2	11.4	5.4
Mar	34° / 22°	36	6.2	11.9	3.5
Apr	35° / 25°	75	11.9	12.4	2.4
May	33° / 25°	262	23.4	12.8	2.2
Jun	32° / 26°	316	25.1	13.1	2.2
Jul	32° / 26°	372	26.5	13	2.4
Aug	31° / 25°	401	27.5	12.6	2.4
Sep	32° / 25°	300	24.7	12.1	2.7
Oct	31° / 24°	101	11.9	11.6	4.2
Nov	30° / 21°	22	3	11.2	5.8
Dec	29° / 18°	8	1.2	10.9	7.2

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Vientiane gets around 372 mm of rain over 42 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Spring

Winds average 6 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 36 min in early March to 13 hours by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 5.7 kWh/m².

Planning a trip in spring

Hazard calendar for Vientiane

In seasonPeak

In spring, Vientiane overlaps its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

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

Vientiane's monsoon runs May–September, when most of the year's rain falls.

Pacific typhoon

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Vientiane?

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.

2.7

Sightseeing

3rd-best month of the year

5.4

Beach & pool

3rd-best month of the year

spring is a weaker month for outdoor sightseeing in Vientiane.

What to pack for Vientiane in Spring

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

In spring, Vientiane sees daytime highs around 34°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 42 days see rain.

light clothesrain gearsun protection

UV index in Vientiane in Spring

LowModerateHighVery highExtreme

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 Vientiane peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (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)	8	10	12	10	11	13	13	13	11	10	8	7
Level	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	8	Very high
Feb	10	Very high
Mar	12	Extreme
Apr	10	Extreme
May	11	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	10	Extreme
Nov	8	Very high
Dec	7	Very high

Air quality in Vientiane in Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.

Air quality in Vientiane is worst in March — around 56 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (July, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Vientiane's WHO annual average of 25.8 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	23	32	56	53	23	17	16	17	17	19	18	19
Level	Moderate	Moderate	Unhealthy	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	23	Moderate
Feb	32	Moderate
Mar	56	Unhealthy
Apr	53	Poor
May	23	Moderate
Jun	17	Moderate
Jul	16	Moderate
Aug	17	Moderate
Sep	17	Moderate
Oct	19	Moderate
Nov	18	Moderate
Dec	19	Moderate

Location & terrain

Where is Vientiane?

Vientiane sits at 18.0°N, 102.6°E, 174 m above sea level, in Laos. The nearest listed city is Tha Bo, 13 km away.

Topography around Vientiane

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

Within 3 km, the terrain around Vientiane has only modest variations in elevation — a maximum elevation change of 33 m around an average of 171 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 74 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,487 m.

The land around Vientiane is covered by artificial surfaces (53%) within 3 km, cropland (36%) and trees (34%) within 16 km, and trees (57%) and cropland (34%) within 80 km.

3 km

33 m

artificial surfaces 53%

16 km

74 m

cropland 36%

80 km

1,487 m

trees 57%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Winter Vientiane year-round climate Summer →

Spring weather nearby: Tha Bo 13 km · Nong Khai 18 km · Nam Som 49 km · Kut Chap 60 km · Phon Charoen 60 km · Udon Thani 64 km · Ban Dung 76 km · Na Klang 85 km

Laos travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C / E / F; 230 V · 50 Hz
Prices: ≈ 23% of US; price level, 2025
GDP per capita: $2,325; 2025
Happiness: 5.5 / 10; World Happiness, 2025
Safe drinking water: 35%; of population, 2024
Road deaths: 17.9; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Low; EF EPI 461
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 Vientiane (17.9667°, 102.6°, elevation 174 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.