S
M
T
W
T
F
S
26
84°
66°
27
82°
71°
28
78°
71°
29
71°
62°
30
68°
56°
1
65°
54°
2
71°
48°
3
76°
47°
4
80°
60°
5
77°
63°
6
75°
54°
7
69°
53°
8
76°
50°
9
82°
57°
10
81°
60°
11
75°
57°
12
81°
51°
13
85°
54°
14
81°
55°
15
89°
61°
16
85°
72°
17
89°
67°
18
92°
75°
19
90°
71°
20
80°
68°
21
80°
70°
22
77°
68°
23
82°
69°
24
82°
68°
25
79°
69°
26
81°
70°
27
85°
69°
28
83°
70°
29
85°
70°
30
84°
69°
31
87°
69°
1
86°
66°
2
89°
69°
3
84°
69°
4
83°
64°
5
85°
67°
6
89°
71°
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 77° to 90°, with overnight lows between 64° and 71°. The average high for May is 84° with an average low of 69°. 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.
