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°
62°
20
92°
66°
21
93°
68°
22
88°
67°
23
89°
67°
24
87°
66°
25
85°
67°
26
84°
66°
27
85°
66°
28
85°
66°
29
84°
65°
30
83°
63°
31
82°
62°
1
88°
66°
2
89°
66°
3
89°
65°
4
83°
66°
5
84°
66°
6
87°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sumter Southeast
Sumter Southeast's May 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 61° and 68°. The average high for May is 87° with an average low of 65°. 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 Sumter Southeast. See also: June | July | August.
