S
M
T
W
T
F
S
26
67°
49°
27
76°
50°
28
74°
59°
29
65°
49°
30
59°
41°
1
57°
42°
2
57°
36°
3
62°
33°
4
77°
50°
5
68°
56°
6
60°
44°
7
61°
40°
8
71°
42°
9
74°
54°
10
71°
55°
11
71°
51°
12
75°
44°
13
72°
49°
14
64°
42°
15
69°
41°
16
75°
57°
17
84°
63°
18
86°
66°
19
86°
64°
20
71°
55°
21
68°
52°
22
67°
58°
23
72°
62°
24
72°
61°
25
78°
62°
26
73°
63°
27
83°
66°
28
82°
61°
29
81°
57°
30
80°
58°
31
80°
55°
1
74°
53°
2
76°
51°
3
76°
54°
4
80°
61°
5
85°
65°
6
83°
67°
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 74° to 85°, with overnight lows between 51° and 67°. The average high for May is 79° with an average low of 58°. 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.
