If you are thinking of traveling to Vientiane in May, think and plan carefully. The average daytime high temperature is usually around +33°C, and there are only about 1 sunny days in total throughout the whole month. Pack for extremes to ensure that you are as comfortable as possible. Search flightsin one click on Avionero.
Average weather
☀️
+33°C
Avg. max. temperature
+21°C
Min.
+43°C
Max.
228 mm
Total precipitation
78%
Avg. humidity
1 m/s
Avg. wind
1 ☀️
Sunny Days
3 ⛅️
Cloudy
23 🌦
Rainy
Our opinion: Vientiane has uncomfortable weather in May.
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Average temperature in Vientiane in May
Here are the expected maximum, average and minimum temperatures in Vientiane for May based on the historical data.
Last Year
Historical Data
Going from a maximum of +43°C during the day to a minimum of +25°C during the night, the temperature in May averages around +37°C.
The average maximum temperature goes up 6% by the end of the month, compared with the beginning of the month, from +37°C to +38°C.
Is Vientiane warm or cold in May?
Vientiane is typically hot in May.
Maximum temperatures go down compared to the previous month from +35°C to +33°C. The minimum temperature also goes up from +25°C to +25°C.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
May is one of the warmest months in Vientiane, here is the comparison with other months:
Climate in Vientiane in May
Vientiane weather looks like this, on average, in May and the surrounding months.
April
May
June
Avg. temperature
+35°C
+33°C
+32°C
Min. temperature
+17°C
+21°C
+19°C
Max. temperature
+44°C
+43°C
+39°C
Rainfall
65 mm
228 mm
310 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
69%
78%
82%
Air pressure
1008 HPa
1006 HPa
1005 HPa
Sunny days
6
1
0
Cloudy days
7
3
2
Rainy days
15
23
25
Snowy days
0
0
0
May typically has worse weather conditions compared to April.It’s getting colder in May. From +35°C in the day, the average maximum temperature lowers to +33°C.Prepare for more rain. Average rainfall goes from 65 mm to 228 mm.Humidity rises from 69% to 78%.The average wind speed doesn’t change much during May, staying around 1 m/s.The days becoming less sunny, going from 6 sunny days in April to 1 in May.
But maybe it is worth considering traveling in June as the weather gets better.
Wind speed in Vientiane in May based on historical data.
Last Year
Historical Data
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Vientiane is gradually increasing during May, going from 1 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during May in Vientiane based on historical data.
Last Year
Historical Data
Typically, there is a 58% chance of rain on an average day in May, with total rainfall of approximately 82 mm. The maximum amount of rainfall per day is around 13 mm, which is considered light rain.May is a pretty wet month with over 18 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Vientiane wettest month is August, where a typical day has a 87% chance of precipitation and 373 mm of rainfall per day. December, on the other hand, is the driest month with a mere 6% chance of precipitation and 5 mm of rainfall per day.
How was the weather last May in Vientiane?
This is the weather in Vientiane in May 2024:
1 May
☁️
+37°C
2 May
☁️
+40°C
3 May
☁️
+37°C
4 May
☁️
+40°C
5 May
☀️
+41°C
6 May
☁️
+42°C
7 May
☁️
+43°C
8 May
☁️
+35°C
9 May
🌧️
+38°C
10 May
☁️
+36°C
11 May
🌧️
+35°C
12 May
🌧️
+34°C
13 May
🌧️
+30°C
14 May
🌧️
+33°C
15 May
☁️
+37°C
16 May
☀️
+36°C
17 May
☁️
+37°C
18 May
☀️
+38°C
19 May
☀️
+39°C
20 May
☀️
+40°C
21 May
☀️
+39°C
22 May
🌧️
+39°C
23 May
🌧️
+36°C
24 May
🌧️
+35°C
25 May
🌧️
+36°C
26 May
☁️
+33°C
27 May
☁️
+36°C
28 May
☁️
+33°C
29 May
☁️
+36°C
30 May
☁️
+36°C
31 May
☀️
+38°C
In May 2024 Vientiane had 7 sunny days, 15 cloudy days, and 9 rainy days. The average maximum temperature was +37°C, with an absolute maximum of +43°C and a minimum of +30°C. The average humidity was 66%, with a maximum of 100% and a minimum of 28%. The average wind speed was 1 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in May?
Climate Change over Years
This is how Vientiane climate have been changing during last 43 years period.
The climate in Vientiane in May has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+30°C) and the highest in 2019 (+33°C). The driest year was 2019 with only 1054 mm of rainfall, and the wettest year was 1994 with 2326 mm.
FAQ
Frequently asked questions about the weather in Vientiane in May:
Is May a good time to visit Vientiane?
There is never a bad time to go to Vientiane, but the weather isn’t the best in May, so plan on enjoying the great indoor attractions of Vientiane and pack for the extremes in weather.
Can you sunbathe in Vientiane in May?
Absolutely, May is hot in Vientiane. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.
Is Vientiane rainy in May?
Vientiane is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Vientiane in May?
Usually, it’s not very sunny in Vientiane in May, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Vientiane, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
