S
M
T
W
T
F
S
26
77°
56°
27
76°
52°
28
63°
47°
29
62°
42°
30
67°
38°
1
65°
33°
2
63°
37°
3
77°
45°
4
82°
52°
5
59°
49°
6
61°
43°
7
69°
38°
8
62°
47°
9
83°
50°
10
69°
45°
11
81°
43°
12
82°
53°
13
77°
47°
14
78°
45°
15
86°
58°
16
87°
63°
17
85°
65°
18
78°
58°
19
67°
50°
20
66°
51°
21
69°
59°
22
70°
57°
23
76°
60°
24
82°
62°
25
81°
61°
26
77°
63°
27
83°
61°
28
81°
60°
29
79°
58°
30
80°
60°
31
78°
59°
1
83°
64°
2
82°
63°
3
75°
59°
4
75°
59°
5
82°
65°
6
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sumner
Sumner's May 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 50° and 65°. The average high for May is 77° with an average low of 60°. 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 Sumner. See also: June | July | August.
