S
M
T
W
T
F
S
26
87°
59°
27
82°
60°
28
73°
64°
29
82°
64°
30
74°
59°
1
67°
55°
2
71°
46°
3
73°
42°
4
81°
54°
5
80°
63°
6
79°
65°
7
72°
55°
8
72°
52°
9
77°
55°
10
81°
58°
11
80°
57°
12
81°
60°
13
78°
57°
14
81°
59°
15
82°
59°
16
84°
61°
17
83°
60°
18
80°
63°
19
83°
64°
20
80°
64°
21
80°
61°
22
81°
58°
23
78°
57°
24
79°
58°
25
80°
60°
26
81°
58°
27
79°
58°
28
80°
59°
29
82°
64°
30
83°
65°
31
82°
66°
1
81°
67°
2
82°
66°
3
83°
66°
4
83°
65°
5
85°
67°
6
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sumter
Sumter's May 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 52° and 68°. The average high for May is 81° with an average low of 61°. 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. See also: June | July | August.
