S
M
T
W
T
F
S
26
46°
28°
27
44°
38°
28
42°
35°
29
42°
27°
30
41°
24°
1
44°
32°
2
40°
27°
3
46°
28°
4
43°
33°
5
42°
31°
6
41°
26°
7
45°
28°
8
47°
28°
9
45°
26°
10
48°
27°
11
47°
29°
12
47°
28°
13
50°
28°
14
53°
29°
15
48°
31°
16
49°
29°
17
49°
29°
18
50°
28°
19
50°
28°
20
51°
31°
21
50°
27°
22
50°
27°
23
51°
33°
24
52°
30°
25
52°
29°
26
53°
29°
27
56°
32°
28
60°
35°
29
60°
36°
30
59°
35°
31
58°
37°
1
60°
36°
2
62°
37°
3
60°
36°
4
62°
38°
5
62°
38°
6
65°
39°
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 40° to 65°, with overnight lows between 26° and 39°. The average high for May is 52° with an average low of 31°. 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.
