S
M
T
W
T
F
S
26
78°
62°
27
83°
52°
28
85°
54°
29
83°
61°
30
88°
61°
1
85°
58°
2
87°
62°
3
90°
72°
4
83°
58°
5
76°
59°
6
79°
52°
7
88°
55°
8
94°
59°
9
97°
64°
10
99°
66°
11
103°
65°
12
100°
75°
13
99°
70°
14
97°
68°
15
93°
64°
16
94°
63°
17
90°
61°
18
87°
64°
19
90°
61°
20
90°
61°
21
93°
64°
22
93°
66°
23
92°
68°
24
95°
71°
25
95°
64°
26
96°
65°
27
96°
66°
28
96°
66°
29
97°
69°
30
104°
69°
31
99°
70°
1
102°
71°
2
106°
72°
3
108°
69°
4
98°
68°
5
95°
68°
6
99°
71°
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 92° to 108°, with overnight lows between 64° and 72°. The average high for May is 98° with an average low of 68°. 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.
