S
M
T
W
T
F
S
26
91°
75°
27
91°
75°
28
93°
73°
29
93°
71°
30
88°
70°
1
93°
75°
2
99°
79°
3
99°
75°
4
93°
73°
5
N/A
6
96°
77°
7
100°
77°
8
94°
75°
9
87°
74°
10
89°
74°
11
88°
75°
12
85°
77°
13
87°
79°
14
89°
80°
15
92°
77°
16
92°
77°
17
91°
76°
18
87°
79°
19
86°
78°
20
86°
78°
21
83°
77°
22
83°
76°
23
82°
77°
24
82°
77°
25
83°
78°
26
85°
79°
27
85°
79°
28
86°
78°
29
85°
80°
30
86°
79°
31
87°
80°
1
87°
80°
2
86°
79°
3
87°
80°
4
86°
78°
5
82°
77°
6
80°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Vientiane
Vientiane's May 2026 forecast shows daily high temperatures ranging from 80° to 100°, with overnight lows between 74° and 80°. The average high for May is 87° with an average low of 78°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Vientiane. See also: June | July | August.
