S
M
T
W
T
F
S
26
82°
55°
27
70°
61°
28
70°
62°
29
66°
51°
30
64°
44°
1
61°
47°
2
59°
42°
3
70°
40°
4
79°
57°
5
69°
46°
6
61°
46°
7
65°
42°
8
75°
51°
9
78°
55°
10
73°
56°
11
76°
48°
12
83°
48°
13
75°
56°
14
71°
45°
15
81°
51°
16
84°
66°
17
87°
67°
18
85°
67°
19
87°
61°
20
66°
57°
21
74°
58°
22
73°
63°
23
78°
64°
24
78°
62°
25
76°
63°
26
77°
65°
27
78°
64°
28
79°
65°
29
79°
63°
30
80°
62°
31
81°
62°
1
80°
58°
2
83°
62°
3
76°
59°
4
75°
56°
5
76°
59°
6
80°
64°
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 87°, with overnight lows between 56° and 65°. The average high for May is 78° with an average low of 61°. 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.
