S
M
T
W
T
F
S
26
73°
55°
27
70°
52°
28
70°
46°
29
82°
55°
30
73°
57°
1
66°
55°
2
59°
50°
3
72°
41°
4
81°
45°
5
82°
48°
6
84°
59°
7
79°
59°
8
72°
50°
9
77°
57°
10
86°
59°
11
86°
57°
12
70°
48°
13
81°
46°
14
81°
57°
15
79°
43°
16
88°
48°
17
91°
59°
18
92°
61°
19
92°
63°
20
91°
67°
21
94°
66°
22
86°
66°
23
90°
68°
24
90°
68°
25
87°
66°
26
85°
68°
27
85°
68°
28
86°
67°
29
85°
66°
30
84°
64°
31
85°
69°
1
86°
66°
2
87°
66°
3
87°
65°
4
82°
66°
5
82°
66°
6
85°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Sumter
South Sumter's May 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 61° and 69°. The average high for May is 87° with an average low of 66°. 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 South Sumter. See also: June | July | August.