S
M
T
W
T
F
S
26
80°
60°
27
73°
55°
28
72°
49°
29
85°
58°
30
77°
63°
1
68°
56°
2
61°
54°
3
72°
46°
4
81°
49°
5
83°
53°
6
88°
60°
7
80°
63°
8
73°
57°
9
75°
60°
10
86°
62°
11
85°
59°
12
72°
55°
13
81°
49°
14
80°
60°
15
79°
46°
16
88°
51°
17
91°
67°
18
93°
68°
19
93°
63°
20
93°
66°
21
93°
67°
22
91°
69°
23
83°
69°
24
83°
68°
25
79°
69°
26
83°
68°
27
83°
68°
28
90°
70°
29
84°
66°
30
73°
64°
31
75°
61°
1
73°
59°
2
78°
57°
3
81°
64°
4
79°
63°
5
82°
65°
6
81°
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 73° to 90°, with overnight lows between 57° and 70°. The average high for May is 80° with an average low of 65°. 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.
