S
M
T
W
T
F
S
26
70°
34°
27
59°
43°
28
59°
48°
29
68°
46°
30
77°
43°
1
75°
46°
2
75°
50°
3
82°
50°
4
81°
50°
5
68°
52°
6
63°
52°
7
66°
46°
8
64°
46°
9
70°
46°
10
68°
46°
11
73°
50°
12
82°
46°
13
57°
50°
14
61°
48°
15
52°
45°
16
59°
41°
17
63°
36°
18
68°
43°
19
64°
48°
20
68°
48°
21
77°
43°
22
79°
46°
23
70°
50°
24
75°
45°
25
63°
48°
26
65°
47°
27
78°
53°
28
85°
54°
29
64°
47°
30
64°
45°
31
72°
47°
1
79°
51°
2
92°
55°
3
79°
52°
4
76°
51°
5
71°
52°
6
70°
51°
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 64° to 92°, with overnight lows between 45° and 55°. The average high for May is 75° 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.
