S
M
T
W
T
F
S
26
48°
39°
27
50°
39°
28
63°
30°
29
68°
37°
30
68°
45°
1
77°
48°
2
79°
45°
3
70°
43°
4
55°
43°
5
48°
43°
6
68°
43°
7
75°
41°
8
75°
54°
9
79°
48°
10
90°
45°
11
90°
50°
12
91°
48°
13
70°
52°
14
73°
48°
15
73°
54°
16
66°
54°
17
64°
43°
18
68°
41°
19
73°
41°
20
78°
46°
21
80°
53°
22
82°
52°
23
83°
47°
24
81°
48°
25
77°
51°
26
71°
44°
27
72°
45°
28
78°
51°
29
75°
46°
30
76°
48°
31
80°
51°
1
86°
55°
2
78°
53°
3
78°
53°
4
77°
52°
5
78°
53°
6
78°
53°
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 71° to 86°, with overnight lows between 41° and 55°. The average high for May is 78° with an average low of 50°. 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.
