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When to Visit Vientiane

Climate guide & best times to travel

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Monthly Climate Data for Vientiane Average temperature and rainfall by month Climate Overview 13°C 19°C 26°C 32°C 39°C Rainfall (mm) 0 170 340 Jan Jan: 29.0°C high, 18.0°C low, 8mm rain Feb Feb: 31.0°C high, 19.0°C low, 18mm rain Mar Mar: 33.0°C high, 21.0°C low, 43mm rain Apr Apr: 34.0°C high, 24.0°C low, 89mm rain May May: 33.0°C high, 25.0°C low, 226mm rain Jun Jun: 32.0°C high, 25.0°C low, 264mm rain Jul Jul: 31.0°C high, 25.0°C low, 300mm rain Aug Aug: 31.0°C high, 25.0°C low, 340mm rain Sep Sep: 31.0°C high, 24.0°C low, 264mm rain Oct Oct: 31.0°C high, 23.0°C low, 86mm rain Nov Nov: 30.0°C high, 21.0°C low, 15mm rain Dec Dec: 28.0°C high, 19.0°C low, 5mm rain Temperature Rainfall
Vientiane sits in the Mekong River valley at roughly 17 degrees north latitude, which puts it squarely in a tropical monsoon climate with two seasons that feel different from each other. The dry season runs from November through April. The wet season arrives in May and does not fully release its grip until October. Daily downpours define it. Humidity settles in like a second atmosphere. Even within these broad categories there is meaningful variation. Understanding the nuances separates a comfortable trip from a soggy or sweltering one. The dry season in Vientiane splits into two distinct phases. From November through February, the city experiences cool-dry conditions. Daytime temperatures hover between 28°C (82°F) and 31°C (88°F). Nights drop to pleasant lows around 18-19°C (64-66°F). You might want a light layer after dark. March and April shift into hot-dry territory. Temperatures climb toward 33-34°C (91-93°F). The air carries a still, baking quality you notice in your lungs as much as on your skin. Rainfall in the peak dry months is nearly nothing. December and January see barely 5-8mm for the entire month. The wet season is more dramatic than its reputation suggests. May through October brings regular afternoon thunderstorms. By July and August Vientiane receives well over 300-340mm of rain per month. The heat eases slightly compared to April. Highs settle around 31-32°C (88-90°F). The humidity fills in the gap. It does not feel any more comfortable in a practical sense. Mornings are often clear and oppressively warm before clouds build through the afternoon. The Mekong rises significantly. The surrounding landscape turns a deep green that is quite striking if you can accept the inconvenience of planning around daily rain windows.

Best Time to Visit

Recommended timing for different travel styles.

Cultural
November through February is the sweet spot. The temperatures in Vientiane are manageable for long days on foot. The air is clear enough to appreciate temples like Pha That Luang properly. Morning alms-giving ceremonies are visible. The low humidity means you will not be exhausted after two hours outdoors.
Adventure
The same November-to-February window applies. October is worth considering. The rains are tapering. The countryside is still lushly green. The trails have not yet dried out to the point of dust. The Mekong is at its most photogenic in October-November as the floodwaters recede.
Budget
May and June offer the lowest crowds and some of the most favorable accommodation pricing in Vientiane. You are accepting the monsoon as part of the deal. The rains tend to follow a pattern. Usually a heavy afternoon storm followed by clearing. Mornings remain workable for sightseeing.
Comfort
December and January are the safest bet. Crowd levels are higher than the shoulder months. The climate is as close to reliably pleasant as this part of Southeast Asia gets.

What to Pack

Essentials and seasonal recommendations for Vientiane.

Year-Round Essentials
A high-SPF sunscreen
Non-negotiable regardless of season. Even in the wet season the UV index in Vientiane is higher than you would expect under cloud cover.
A reusable water bottle
matters year-round given the heat.
Flip-flops or sandals you can slip off easily
practical for temple visits where removing footwear is constant.
A small first-aid kit with rehydration salts
Worth carrying from March through October. Heat and humidity make dehydration a real risk.
Modest cover-up clothing - lightweight trousers or a long skirt
needed for temple entry and is also useful for evening mosquito protection.
dry cool season (November to February)
Clothing
a lightweight layer or thin long-sleeved shirt for evenings
Footwear
Closed-toe shoes are worth having for the cooler nights.
hot-dry season (March and April)
Clothing
linen or moisture-wicking synthetics in light colors
Accessories
A wide-brimmed hat
Layering Tip
Midday is brutal. Dress around the assumption that you will want to retreat indoors from roughly 11am to 3pm.
wet season (May through October)
Clothing
Quick-dry fabrics
Footwear
Waterproof sandals or shoes you're comfortable getting soaked
Accessories
A compact umbrella or packable rain jacket, A dry bag or waterproof pouch for your phone and documents
Plug Type
Type A (two flat parallel pins), Type B (two flat pins plus a round grounding pin), and Type C (two round pins).
Voltage
220V/50Hz
Adapter Note
A universal travel adapter is the safest approach. Most modern electronics handle the voltage automatically. Check your devices before relying on it.
Skip These Items
Heavy jackets. Winter layers. Skip them. Even the coolest Vientiane nights rarely need more than a light layer. Formal or business attire, unless you have a specific reason. Stilettos. Any shoes with difficult walking surfaces. Leave them home. Vientiane's pavements are uneven and often wet. An excessive supply of toiletries, which are widely available in the city. High-heeled or rigid footwear. Avoid it. Temple visits require shoes you can slip off fast.
Full Packing Checklist

Interactive checklist with shopping links for every item you need.

View Vientiane Packing List →

Month-by-Month Guide

Climate conditions and crowd levels for each month of the year.

January

Highs around 29°C (84°F), lows dipping to 18°C (64°F). This is as close to crisp as Vientiane gets. Evenings on the Mekong riverside feel comfortable.

High 29°C (84°F)
Low 18°C (64°F)
Rainfall 8mm
Crowds High
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February

Temperatures begin their slow climb. Highs reach 31°C (88°F) and lows around 19°C (66°F). Still very dry. The air has a clarity that makes February one of the more pleasant months for exploring the city's lanes and temple grounds.

High 31°C (88°F)
Low 19°C (66°F)
Rainfall 18mm
Crowds High
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March

The heat arrives properly now. Highs push to 33°C (91°F). You will feel it on exposed stone and pavement by midday. The afternoons feel long and warm. Shade-seeking becomes instinctive.

High 33°C (91°F)
Low None
Rainfall 43mm
Crowds Medium
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April

The peak of the hot-dry season. Highs touch 34°C (93°F) and lows around 24°C (75°F). April brings the Lao New Year (Bun Pi Mai). Vientiane fills with water-festival celebrations. The city takes on a particular energy.

High 34°C (93°F)
Low 24°C (75°F)
Rainfall 89mm
Crowds Medium
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May

The monsoon arrives in earnest. Highs ease back to 33°C (91°F) but humidity escalates. You will notice the shift immediately. Mornings are often still usable for sightseeing. Afternoons frequently bring heavy rain.

High 33°C (91°F)
Low None
Rainfall 226mm
Crowds Low
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June

Firmly in wet season territory. Highs around 32°C (90°F). Persistent cloud cover means the heat is slightly less oppressive than April. The moisture makes up for it. Vientiane's streets can flood after heavy storms.

High 32°C (90°F)
Low None
Rainfall 264mm
Crowds Low
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July

One of the wetter months. The city is quieter. The landscape is green. If the rain does not bother you, there is something to be said for Vientiane without the tourist press.

High 31°C (89°F)
Low 25°C (77°F)
Rainfall 300mm
Crowds Low
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August

The wettest month of the year. Conditions are similar to July. Warm and humid, with frequent heavy downpours. The Mekong runs high and fast.

High None
Low None
Rainfall 340mm
Crowds Low
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September

Still very wet. There is a subtle sense that the season is beginning its long wind-down. This tends to be one of the quieter periods in Vientiane. The city's accommodation scene reflects that.

High 31°C (89°F)
Low None
Rainfall 264mm
Crowds Low
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October

The transition begins. Rainfall drops sharply. Still significant but a marked relief compared to the peak months. The countryside around Vientiane is still green. The air carries a freshness that the dry season eventually strips away.

High None
Low None
Rainfall 86mm
Crowds Medium
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November

The dry season returns. With it come the clearest, most comfortable conditions of the year. Vientiane feels unhurried and pleasant.

High 30°C (87°F)
Low 21°C (70°F)
Rainfall 15mm
Crowds High
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December

The coolest and driest month. Highs around 28°C (82°F) and lows potentially reaching 18°C (64°F) or below on the coldest nights. Excellent conditions for exploring Vientiane's outdoor markets and Buddha Park.

High 28°C (82°F)
Low 18°C (64°F)
Rainfall 5mm
Crowds High
View Details →

Ready to plan your trip to Vientiane?

Now that you've got the research covered, here's where to go next.

Top Things to Do

Curated attractions, tours, and experiences in Vientiane.

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Where to Stay

Best neighbourhoods and hotels for every budget.

Find hotels →

What to Pack

Climate-specific gear and essentials for Vientiane.

See packing list →

Continue Planning Your Trip

Packing List

What to bring on your trip for Vientiane

When to Visit

Best times to travel for Vientiane

Budget Guide

Trip costs and money tips for Vientiane