S
M
T
W
T
F
S
26
68°
39°
27
70°
50°
28
63°
50°
29
52°
36°
30
54°
32°
1
48°
34°
2
57°
30°
3
70°
45°
4
81°
41°
5
57°
41°
6
54°
30°
7
63°
32°
8
70°
32°
9
72°
39°
10
63°
32°
11
63°
37°
12
73°
39°
13
64°
39°
14
72°
34°
15
81°
52°
16
82°
59°
17
84°
63°
18
81°
64°
19
71°
48°
20
63°
43°
21
59°
48°
22
60°
49°
23
66°
51°
24
72°
52°
25
77°
54°
26
80°
56°
27
81°
57°
28
76°
59°
29
79°
57°
30
78°
58°
31
80°
58°
1
75°
53°
2
77°
57°
3
70°
53°
4
70°
52°
5
73°
58°
6
77°
59°
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 81°, with overnight lows between 43° and 59°. The average high for May is 73° 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 Sumner. See also: June | July | August.
