S
M
T
W
T
F
S
26
65°
37°
27
70°
39°
28
68°
42°
29
64°
47°
30
54°
40°
1
56°
35°
2
50°
33°
3
53°
33°
4
69°
38°
5
78°
49°
6
55°
42°
7
54°
36°
8
52°
37°
9
49°
35°
10
60°
41°
11
56°
33°
12
58°
32°
13
57°
41°
14
56°
45°
15
63°
43°
16
77°
44°
17
81°
56°
18
90°
67°
19
88°
70°
20
73°
42°
21
63°
38°
22
64°
47°
23
61°
51°
24
66°
49°
25
67°
51°
26
68°
53°
27
70°
53°
28
73°
54°
29
74°
55°
30
72°
53°
31
75°
49°
1
69°
51°
2
66°
50°
3
65°
50°
4
66°
54°
5
69°
54°
6
71°
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 61° to 90°, with overnight lows between 38° and 70°. The average high for May is 71° with an average low of 52°. 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.
