Laos
Laos in September
Where it is warm, dry and good for swimming in Laos in September — compared across the country’s main destinations.
Quick answers
- Where is it warmest in Laos in September?
- Vientiane is the warmest of the 16 destinations compared, with highs of 32°C (89°F) in September; Pakxong is the coolest at 25°C (77°F).
Warmest
32°
Vientiane
Coolest
25°
Pakxong
Driest
143 mm
Khoa
September in Laos ranges from 25°C (77°F) in Pakxong to 32°C (89°F) in Vientiane — a spread of 7 degrees across the country. On average it is about as warm as August. Rain is frequent in most destinations. Best bets this month: Muang Phonsavan, Luang Prabang, and Vientiane.
Best places in Laos in September
65 
Muang Phonsavan
Xiangkhoang · Laos
27° / 19° 198 mm Sep
43
Luang Prabang
Luang Prabang · Laos
31° / 22° 175 mm Sep
36
Vientiane
Vientiane · Laos
32° / 24° 275 mm Sep
41
Pakse
Champasak Province · Laos
31° / 24° 406 mm Sep
47
Muang Xay
Oudômxai · Laos
30° / 21° 172 mm Sep
51
Muang Sing
Loungnamtha · Laos
29° / 20° 243 mm Sep
43
Savannakhet
Savannakhet · Laos
31° / 23° 245 mm Sep
40
Vang Vieng
Vientiane Province · Laos
31° / 23° 446 mm Sep
Weather in September by city
| Place | Day | Night | Rain | Sea | Score |
|---|---|---|---|---|---|
| Muang Phonsavan | 27° | 19° | 198 mm | — | 65 |
| Pakxong | 25° | 18° | 375 mm | — | 65 |
| Muang Sing | 29° | 20° | 243 mm | — | 51 |
| Luang Namtha | 30° | 21° | 222 mm | — | 49 |
| Muang Xay | 30° | 21° | 172 mm | — | 47 |
| Luang Prabang | 31° | 22° | 175 mm | — | 43 |
| Savannakhet | 31° | 23° | 245 mm | — | 43 |
| Ban Nahin | 31° | 23° | 370 mm | — | 43 |
| Sainyabuli | 31° | 23° | 216 mm | — | 42 |
| Khoa | 31° | 23° | 143 mm | — | 42 |
| Pakse | 31° | 24° | 406 mm | — | 41 |
| Thakhek | 31° | 24° | 280 mm | — | 41 |
| Pakxan | 31° | 23° | 369 mm | — | 41 |
| Vang Vieng | 31° | 23° | 446 mm | — | 40 |
| Ban Houayxay | 32° | 23° | 266 mm | — | 39 |
| Vientiane | 32° | 24° | 275 mm | — | 36 |
Frequently asked questions
What is the weather like in Laos in September?
Average daytime highs range from 25° in Pakxong to 32° in Vientiane.