Average data for 10 years
1 September
Sunday
+29°
+25°
2 September
Monday
+29°
+25°
3 September
Tuesday
+30°
+25°
4 September
Wednesday
+29°
+26°
5 September
Thursday
+28°
+25°
6 September
Friday
+29°
+25°
7 September
Saturday
+29°
+25°
8 September
Sunday
+29°
+25°
9 September
Monday
+30°
+26°
10 September
Tuesday
+30°
+26°
11 September
Wednesday
+29°
+26°
12 September
Thursday
+28°
+25°
13 September
Friday
+29°
+25°
14 September
Saturday
+27°
+25°
15 September
Sunday
+28°
+24°
16 September
Monday
+28°
+24°
17 September
Tuesday
+29°
+25°
18 September
Wednesday
+30°
+25°
19 September
Thursday
+30°
+25°
20 September
Friday
+29°
+26°
21 September
Saturday
+29°
+25°
22 September
Sunday
+28°
+25°
23 September
Monday
+28°
+24°
24 September
Tuesday
+29°
+25°
25 September
Wednesday
+29°
+25°
26 September
Thursday
+28°
+25°
27 September
Friday
+30°
+25°
28 September
Saturday
+30°
+26°
29 September
Sunday
+30°
+26°
30 September
Monday
+28°
+25°
Cities with similar weather in September
Thailand
Pattaya
Vietnam
Nha Trang
Thailand
Bangkok
Dominican Republic
Santo Domingo
Cuba
Varadero
In September, the weather in Vientiane is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Vientiane has 28 rainy and 2 sunny days in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Vientiane.