Laos September Weather 2025:Forecast and Temperature City by City - TRIPSCOUR

Weather in Laos in september 2025

In this section,you have access to the weather forecast for september for most popular cities in Laos. These predictions are statistics for the month of september from weather reports for many years. The percentage indicates the probability of having the weather indicated.

Average weather in september in Vientiane

tolerable weather UV index:7

Weather at 6am
25°C

Heavy rain

24%

Partly Cloudy

20%

Clear/Sunny

14%

Weather at 12pm
32°C

Clear/Sunny

19%

Partly Cloudy

17%

Heavy rain

16%

Weather at 6pm
27°C

Clear/Sunny

29%

Partly Cloudy

19%

Heavy rain

15%

Weather at 3am
24°C

Moderate rain at times

35%

Heavy rain

23%

Fog

16%

Partly Cloudy

14%

More information about the weather in Vientiane in september



Where to go in Laos in september?

Where to go in Laos in september:destination map

Laos:weather map in september in different regions
Laos:weather map in september in different regions ©tripscour.com/en

Download the map

Where to go in each region in september?

Central of Laos
(Vientiane,Vang Vieng,Thakhek...)
27°C to 32°C14 à 19 days
tolerable weather
North of Laos
(Luang Prabang,Nong Kiau,Luang Namtha...)
27°C to 33°C10 à 20 days
tolerable weather*
South of Laos
(Pakse,Savannakhet,Khong island (Don Khong)...)
30°C to 32°C18 à 26 days
bad weather*
*over most of the region. Weather may vary locally.


Where should you go in Laos in september when it comes to the weather?

Remember:
The climate in Laos in september ranges from tolerable to bad depending on the region and city.

September is not the best month to visit Laos. The weather in Nong Kiau,Louang Namtha,Houei Sai,Luang Prabang,Thakhek and Vientiane is just ok. The sun is not there all the time and you might make you wet by rain frequently. However,if you don't plan a beach and relaxation trip but rather nature excursions,this climate may be good enough for you. In addition,there are definitely fewer tourists at this time.

It's even worse in Phonsavan,Vang Vieng,Pakse,Savannakhet and Khong island (Don Khong) and surrounding areas where the climate is very bad. It is not advisable to visit these areas this month.


Climate in Laos in september

Climate in Vientiane in september

In the month of september,the mean temperature in Vientiane is 29°C (maximum temperature is 32°C and minimum temperature is 25°C). The climate is very hot here in september. With 362mm over 17 days,the weather is rather to rain throughout your holidays. So remember to bring rain clothes.
With a correct climate,the month of september is okay (but not good month) for traveling in this locality in Laos.

September
Average temperature 29°C
Highest temperature 32°C
Lowest temperature 25°C
Rainfall 362mm
Number of days with rainfall 17 day(s)
(56%)
Humidity 93%
Daily sunshine hours 12
Cloud cover 45%
Length of day 12:14
Our opinion at tripscour.com/en tolerable
more information about the climate in Vientiane in september

Climate in Luang Prabang in september

In september,maximum temperature is 33°C and minimum temperature is 23°C (for an average temperature of 28°C). The climate is burning in that locality in this month. With 171mm over 10 days,you will suffer the rain throughout your vacations. So remember to pack clothes for rain.
With proper weather,the month of september is okay (but not good time) for traveling there in Laos.

September
Average temperature 28°C
Highest temperature 33°C
Lowest temperature 23°C
Rainfall 171mm
Number of days with rainfall 10 day(s)
(35%)
Humidity 95%
Daily sunshine hours 12
Cloud cover 52%
Length of day 12:15
Our opinion at tripscour.com/en good
more information about the climate in Luang Prabang in september

Climate in Vang Vieng in september

In the month of september,the mean temperature in Vang Vieng is 26°C (maximum temperature is 32°C and minimum temperature is 20°C). The climate is very hot there in this month. With 338mm over 19 days,the weather is rather to rain during your journey. So remember to bring rain clothes.

September
Average temperature 26°C
Highest temperature 32°C
Lowest temperature 20°C
Rainfall 338mm
Number of days with rainfall 19 day(s)
(64%)
Humidity 95%
Daily sunshine hours 12
Cloud cover 52%
Length of day 12:15
Our opinion at tripscour.com/en tolerable
more information about the climate in Vang Vieng in september

Climate in Khong island (Don Khong) in september

In the month of september,maximum temperature is 31°C and minimum temperature is 25°C (for an average temperature of 28°C). The climate is very warm in that locality in the month of september. With 445mm over 24 days,you may find yourself often in the rain throughout your stay. Consider to bring Rain coats.

September
Average temperature 28°C
Highest temperature 31°C
Lowest temperature 25°C
Rainfall 445mm
Number of days with rainfall 24 day(s)
(79%)
Humidity 96%
Daily sunshine hours 10
Cloud cover 61%
Length of day 12:12
Our opinion at tripscour.com/en bad
more information about the climate in Khong island (Don Khong) in september

Climate in Luang Namtha in september

In september,maximum temperature is 27°C and minimum temperature is 18°C (for an average temperature of 23°C). The climate is burning in this location in the month of september. With 261mm over 15 days,rainfall can happen throughout your journey. But this is rather reasonably and it will not be continuous.
With a correct climate,the month of september is okay (but not good month) for traveling in this city.

September
Average temperature 23°C
Highest temperature 27°C
Lowest temperature 18°C
Rainfall 261mm
Number of days with rainfall 15 day(s)
(49%)
Humidity 96%
Daily sunshine hours 11
Cloud cover 57%
Length of day 12:16
Our opinion at tripscour.com/en tolerable
more information about the climate in Luang Namtha in september


All cities in Laos in september

Vientiane in septembertolerable weather
Luang Prabang in septembergood weather
Vang Vieng in septembertolerable weather
Khong island (Don Khong) in septemberbad weather
Luang Namtha in septembertolerable weather
Nong Kiau in septemberbad weather
Pakse in septembervery bad weather
Savannakhet in septembertolerable weather
Thakhek in septembertolerable weather
Houei Sai in septembertolerable weather
Phonsavan in septembertolerable weather


Weather data for Laos in september:

Weather data for Laos in september is derived from an average of the weather forecast since 2009 in Laos. There is a margin of error and these forecasts are to be considered as general information only. The weather in Laos can vary slightly from year to year,but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Laos.