S
M
T
W
T
F
S
26
63°
39°
27
61°
41°
28
70°
39°
29
77°
39°
30
81°
39°
1
81°
45°
2
77°
50°
3
77°
48°
4
68°
55°
5
79°
52°
6
84°
54°
7
86°
46°
8
82°
45°
9
90°
45°
10
88°
48°
11
91°
48°
12
88°
52°
13
69°
47°
14
75°
41°
15
69°
38°
16
62°
35°
17
68°
37°
18
74°
42°
19
79°
43°
20
80°
46°
21
79°
45°
22
77°
44°
23
76°
40°
24
75°
41°
25
76°
44°
26
75°
44°
27
77°
43°
28
72°
42°
29
72°
44°
30
73°
43°
31
78°
47°
1
81°
48°
2
81°
48°
3
79°
46°
4
73°
41°
5
73°
41°
6
74°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Summerville
Summerville's May 2026 forecast shows daily high temperatures ranging from 62° to 81°, with overnight lows between 35° and 48°. The average high for May is 75° with an average low of 43°. 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 Summerville. See also: June | July | August.
