Best Time to Visit Vientiane

Laos · weather by month, temperature and rainfall

Best monthsDecember and January
HottestApril · 37°C
ColdestJanuary · 15°C
WettestAugust · 246 mm

If you want the most pleasant weather in Vientiane, plan your trip for December and January. April is the hottest month, with average highs of 37°C (98°F), while January is the coldest, with lows around 15°C (59°F). The rainy season runs over May to September; August is the wettest month with about 246 mm (9.7 in) of rain. June is the least comfortable month, mainly because of the rain.

When to go to Vientiane: a seasonal guide

Cool and dry: November to February

This is the best stretch, and December and January top our comfort score. Days are warm at 27–28°C, and nights dip to about 15°C. Rain is rare. December gets just 1 wet day.

You can walk the Mekong riverfront at sunset without melting. The evening night market there is pleasant, and grilled fish and sticky rice taste better outdoors. Climbing the stairs of Pha That Luang, the golden stupa (a dome-shaped temple monument), is easy in this weather.

November brings the That Luang Festival, a big temple fair with processions and a fireworks show. It usually falls around the full moon. It's the busiest, most colourful week of the year, so rooms near the centre fill up. February is still good but starts to warm up.

Hot season: March and April

Heat builds fast. April is the hottest month at 37°C, and our rating for it is Poor. March is Fair, but the afternoons are already sticky and hazy.

Plan around the middle of the day. Visit Wat Si Saket or the Patuxai monument in the morning, then retreat to a café or a pool. Travelling with kids? This is the hardest time for it.

Mid-April brings Pi Mai, the Lao New Year. People soak each other with water for several days. It's great fun if you don't mind being wet, and many shops shut. If you want quiet temples, skip it.

Rainy season: May to October

Rain comes almost daily. August is the wettest month, with 246 mm on 26 days, and the sun barely shows. Humidity stays above 80% from July to October. Downpours are often heavy but short, and streets can flood.

It isn't all bad. Crowds are thin, rooms are easy to find, and the countryside turns bright green. If you're on a budget, or you like quiet cafés and museums, it can work. Beach-style days and day trips to Vang Vieng or Buddha Park are less fun in the mud.

Boun Suang Heua, the boat racing festival on the Mekong, takes place in October near the end of Buddhist Lent. It's a good reason to visit then, as the rain has started to ease. October is rated Fair.

If you want one simple answer, aim for late November through January.

Vientiane weather by month

10°15°20°25°30°35°40°0125250January: 9 mm rainFebruary: 16 mm rainMarch: 40 mm rainApril: 68 mm rainMay: 160 mm rainJune: 171 mm rainJuly: 215 mm rainAugust: 246 mm rainSeptember: 208 mm rainOctober: 93 mm rainNovember: 17 mm rainDecember: 5 mm rainJanuary: 28°CFebruary: 32°CMarch: 35°CApril: 37°CMay: 35°CJune: 32°CJuly: 31°CAugust: 30°CSeptember: 31°COctober: 30°CNovember: 29°CDecember: 27°CJanuary: 15°CFebruary: 18°CMarch: 22°CApril: 25°CMay: 25°CJune: 25°CJuly: 24°CAugust: 24°CSeptember: 24°COctober: 22°CNovember: 19°CDecember: 15°CJanFebMarAprMayJunJulAugSepOctNovDec mm°C
Avg high Avg low Rainfall (mm)
Jan28°C / 15°C9 mmExcellentFeb32°C / 18°C16 mmGoodMar35°C / 22°C40 mmFairApr37°C / 25°C68 mmPoorMay35°C / 25°C160 mmPoorJun32°C / 25°C171 mmPoorJul31°C / 24°C215 mmPoorAug30°C / 24°C246 mmPoorSep31°C / 24°C208 mmPoorOct30°C / 22°C93 mmFairNov29°C / 19°C17 mmExcellentDec27°C / 15°C5 mmExcellent

Monthly climate table

MonthHighLowRainRainy daysHumiditySun hrs/dayRating
January28°C 83°F15°C 59°F9 mm266%8.2Excellent 9.8
February32°C 90°F18°C 64°F16 mm357%8.4Good 7.5
March35°C 95°F22°C 71°F40 mm754%7.2Fair 5.7
April37°C 98°F25°C 76°F68 mm1156%5.5Poor 4
May35°C 94°F25°C 77°F160 mm2170%2.5Poor 1.3
June32°C 90°F25°C 76°F171 mm2279%1.3Poor 1
July31°C 88°F24°C 75°F215 mm2582%1.1Poor 1.2
August30°C 87°F24°C 75°F246 mm2685%1Poor 1.3
September31°C 87°F24°C 74°F208 mm2385%1.9Poor 1.6
October30°C 86°F22°C 71°F93 mm1282%4.6Fair 5.7
November29°C 84°F19°C 66°F17 mm377%7Excellent 8.5
December27°C 81°F15°C 59°F5 mm172%8.3Excellent 9.8

Frequently asked questions

When is the best time to visit Vientiane?

The best time to visit Vientiane is December and January, based on comfortable temperatures, low rainfall and plenty of sunshine.

What is the hottest month in Vientiane?

April is the hottest month in Vientiane, with an average high of 37°C (98°F).

What is the coldest month in Vientiane?

January is the coldest month in Vientiane, with an average low of 15°C (59°F).

What is the rainiest month in Vientiane?

August is the wettest month, with about 246 mm (9.7 in) of rain. December is the driest, with 5 mm (0.2 in).

When is the rainy season in Vientiane?

The rainy season in Vientiane is May to September.

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