S
M
T
W
T
F
S
26
69°
47°
27
61°
44°
28
62°
40°
29
62°
44°
30
69°
48°
1
66°
45°
2
63°
42°
3
63°
43°
4
64°
43°
5
68°
50°
6
72°
51°
7
73°
47°
8
67°
49°
9
65°
52°
10
66°
52°
11
74°
54°
12
75°
55°
13
74°
55°
14
75°
53°
15
70°
47°
16
70°
47°
17
71°
48°
18
70°
51°
19
73°
47°
20
69°
48°
21
70°
55°
22
74°
55°
23
75°
57°
24
75°
53°
25
74°
51°
26
71°
52°
27
75°
51°
28
74°
51°
29
74°
52°
30
77°
50°
31
76°
51°
1
75°
59°
2
76°
59°
3
80°
56°
4
80°
56°
5
82°
60°
6
82°
61°
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 61° to 82°, with overnight lows between 40° and 61°. The average high for May is 71° with an average low of 51°. 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.
