S
M
T
W
T
F
S
26
96°
77°
27
96°
75°
28
95°
76°
29
93°
77°
30
93°
76°
1
94°
75°
2
92°
75°
3
93°
76°
4
92°
78°
5
92°
78°
6
91°
77°
7
92°
78°
8
92°
78°
9
93°
77°
10
93°
78°
11
92°
78°
12
93°
77°
13
92°
78°
14
92°
78°
15
91°
78°
16
90°
77°
17
89°
78°
18
89°
78°
19
90°
77°
20
89°
78°
21
90°
78°
22
90°
77°
23
91°
78°
24
89°
78°
25
89°
77°
26
90°
78°
27
88°
78°
28
87°
77°
29
88°
78°
30
87°
78°
31
88°
77°
1
90°
75°
2
89°
76°
3
90°
75°
4
89°
77°
5
90°
76°
6
87°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ban Nam Sai
Ban Nam Sai's May 2026 forecast shows daily high temperatures ranging from 87° to 96°, with overnight lows between 75° and 78°. The average high for May is 91° with an average low of 77°. 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 Ban Nam Sai. See also: June | July | August.