S
M
T
W
T
F
S
26
82°
57°
27
87°
67°
28
73°
58°
29
70°
54°
30
65°
46°
1
69°
46°
2
69°
40°
3
80°
37°
4
82°
60°
5
68°
47°
6
61°
41°
7
69°
44°
8
79°
54°
9
79°
58°
10
72°
45°
11
73°
50°
12
81°
55°
13
83°
54°
14
82°
56°
15
80°
58°
16
79°
58°
17
78°
55°
18
79°
57°
19
80°
54°
20
74°
59°
21
79°
58°
22
75°
58°
23
75°
59°
24
74°
59°
25
75°
58°
26
75°
60°
27
76°
58°
28
76°
58°
29
77°
57°
30
77°
59°
31
78°
58°
1
82°
60°
2
84°
62°
3
83°
62°
4
84°
63°
5
80°
63°
6
79°
64°
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 61° to 84°, with overnight lows between 41° and 64°. The average high for May is 77° with an average low of 57°. 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.
