S
M
T
W
T
F
S
26
84°
63°
27
88°
69°
28
87°
68°
29
86°
65°
30
70°
61°
1
62°
52°
2
72°
48°
3
76°
44°
4
78°
48°
5
82°
54°
6
83°
48°
7
70°
59°
8
68°
60°
9
70°
64°
10
84°
65°
11
82°
65°
12
83°
64°
13
85°
60°
14
85°
60°
15
87°
60°
16
83°
66°
17
86°
65°
18
90°
69°
19
89°
74°
20
82°
71°
21
79°
71°
22
86°
69°
23
83°
68°
24
82°
69°
25
78°
68°
26
87°
67°
27
87°
71°
28
80°
73°
29
86°
72°
30
89°
71°
31
91°
72°
1
90°
72°
2
90°
67°
3
83°
62°
4
84°
67°
5
84°
71°
6
84°
72°
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 83° to 91°, with overnight lows between 62° and 72°. The average high for May is 87° with an average low of 69°. 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.
