S
M
T
W
T
F
S
26
61°
39°
27
72°
36°
28
64°
36°
29
63°
48°
30
61°
46°
1
64°
39°
2
59°
45°
3
61°
43°
4
73°
37°
5
82°
45°
6
68°
54°
7
65°
47°
8
62°
51°
9
61°
50°
10
74°
51°
11
61°
45°
12
63°
44°
13
60°
48°
14
65°
49°
15
69°
53°
16
75°
53°
17
72°
54°
18
75°
55°
19
74°
55°
20
73°
52°
21
68°
48°
22
67°
48°
23
68°
49°
24
69°
49°
25
73°
55°
26
77°
56°
27
72°
53°
28
74°
53°
29
71°
50°
30
75°
56°
31
79°
59°
1
78°
59°
2
77°
56°
3
77°
57°
4
80°
60°
5
81°
60°
6
80°
61°
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 60° to 81°, with overnight lows between 44° and 61°. 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.
