S
M
T
W
T
F
S
26
87°
78°
27
86°
77°
28
87°
78°
29
86°
77°
30
86°
77°
1
87°
79°
2
88°
80°
3
88°
79°
4
88°
78°
5
88°
76°
6
87°
78°
7
87°
77°
8
87°
78°
9
88°
78°
10
87°
79°
11
89°
79°
12
88°
79°
13
87°
78°
14
87°
76°
15
87°
79°
16
87°
77°
17
87°
77°
18
87°
78°
19
88°
78°
20
87°
76°
21
87°
77°
22
85°
76°
23
86°
77°
24
86°
78°
25
86°
76°
26
86°
74°
27
86°
75°
28
86°
74°
29
N/A
30
65°
57°
31
64°
56°
1
63°
54°
2
64°
54°
3
66°
54°
4
64°
55°
5
67°
51°
6
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Sumi
Sumi's May 2026 forecast shows daily high temperatures ranging from 63° to 69°, with overnight lows between 51° and 57°. The average high for May is 65° with an average low of 54°. 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 Sumi. See also: June | July | August.