S
M
T
W
T
F
S
26
55°
41°
27
64°
45°
28
64°
50°
29
52°
36°
30
50°
32°
1
45°
32°
2
57°
30°
3
66°
45°
4
79°
48°
5
57°
39°
6
54°
32°
7
55°
32°
8
66°
32°
9
68°
43°
10
61°
34°
11
52°
36°
12
73°
36°
13
61°
41°
14
66°
36°
15
77°
52°
16
82°
59°
17
68°
54°
18
81°
55°
19
71°
45°
20
58°
41°
21
56°
45°
22
58°
46°
23
63°
48°
24
70°
53°
25
75°
53°
26
75°
55°
27
77°
56°
28
75°
58°
29
76°
55°
30
77°
57°
31
77°
58°
1
75°
53°
2
78°
57°
3
69°
54°
4
69°
52°
5
72°
58°
6
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Summit
Summit's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 41° and 60°. The average high for May is 71° with an average low of 53°. 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 Summit. See also: June | July | August.
