The best times to visit Vientiane for ideal weather are
December 10th to February 11th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Vientiane Travel Guide
Weather in Vientiane
Average temperatures in Vientiane vary little. Considering humidity, temperatures feel hot for most of the year with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 19th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Vientiane, the hottest months are April, May, and then June. See average monthly temperatures below. The warmest time of year is generally mid April where highs are regularly around 97°F (36.1°C) with temperatures rarely dropping below 76.9°F (24.9°C) at night.
Vientiane Temperatures (Fahrenheit)
Vientiane Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Vientiane Perceived Temperature (F)
Vientiane Perceived Temperature (C)
Average Vientiane Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Vientiane are December, January, and then February. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late July with an average of 4 days of significant precipitation the week of July 23rd.
When can you find snow in Vientiane? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
The graph below shows the % chance of rainy and snowy days in Vientiane.
Snow on the Ground
The graph below shows the average snow on the ground in Vientiane (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Vientiane has some very humid months, with other comfortably humid months. The least humid month is March (56.2% relative humidity), and the most humid month is August (76.9%).
Wind in Vientiane is usually extremely calm. The windiest month is April, followed by December and March. April’s average wind speed of around 2.8 knots (3.2 MPH or 5.2 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early May where average top sustained speeds reach 7.6 knots, which is considered a gentle breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Vientiane.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||2.5||Barely noticeable||5.2||Light breeze|
|Feb||2.5||Barely noticeable||5||Light breeze|
|Mar||2.7||Barely noticeable||5.6||Light breeze|
|Apr||2.8||Barely noticeable||6.7||Light breeze|
|May||2.7||Barely noticeable||7.1||Light breeze|
|Jun||2.7||Barely noticeable||6.3||Light breeze|
|Jul||2.7||Barely noticeable||6||Light breeze|
|Aug||2.7||Barely noticeable||6.4||Light breeze|
|Sep||2.7||Barely noticeable||6||Light breeze|
|Oct||2.6||Barely noticeable||5.5||Light breeze|
|Nov||2.6||Barely noticeable||5.5||Light breeze|
|Dec||2.7||Barely noticeable||5.5||Light breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Vientiane?
Our best data indicates this area is somewhat safe, but with extra warnings in a few regions. As of Mar 17, 2019 there are travel warnings and regional advisories for Laos; exercise a high degree of caution and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Jan 29, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Vientiane, Laos is January, followed by February and April. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Vientiane in August. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Vientiane Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 97°F (36.1°C) and 91.5°F (33.1°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 12 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 14 to 18 days of precipitation per month. June – August is the second busiest season for tourism in Vientiane, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 90.4°F (32.4°C) and 86.8°F (30.4°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 2 to 14 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.
Winter (December through February)
Weather is perfect this time of year in Vientiane to be enjoyable for warm weather travelers. The average high during this season is between 92.6°F (33.7°C) and 81.4°F (27.4°C). On average, it rains or snows a very small amount: 0 to 1 times per month. These times of year are the busiest with tourists.