S
M
T
W
T
F
S
26
65°
29°
27
71°
31°
28
62°
32°
29
55°
42°
30
47°
42°
1
60°
34°
2
45°
32°
3
53°
31°
4
68°
27°
5
79°
49°
6
62°
51°
7
61°
44°
8
55°
32°
9
58°
27°
10
65°
44°
11
60°
40°
12
57°
29°
13
50°
31°
14
63°
45°
15
60°
49°
16
77°
46°
17
82°
53°
18
67°
46°
19
88°
66°
20
83°
44°
21
59°
38°
22
64°
43°
23
62°
46°
24
60°
44°
25
67°
47°
26
68°
46°
27
67°
48°
28
70°
50°
29
71°
49°
30
71°
52°
31
72°
47°
1
67°
49°
2
63°
48°
3
63°
48°
4
64°
51°
5
63°
51°
6
71°
52°
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 59° to 88°, with overnight lows between 38° and 66°. The average high for May is 68° with an average low of 48°. 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.
