S
M
T
W
T
F
S
26
83°
61°
27
80°
64°
28
71°
57°
29
85°
64°
30
76°
64°
1
67°
56°
2
71°
51°
3
74°
43°
4
80°
45°
5
82°
50°
6
84°
62°
7
81°
67°
8
71°
61°
9
69°
61°
10
80°
63°
11
85°
61°
12
70°
60°
13
81°
60°
14
80°
57°
15
80°
49°
16
86°
54°
17
90°
68°
18
88°
62°
19
88°
64°
20
90°
68°
21
90°
67°
22
89°
66°
23
86°
70°
24
86°
67°
25
84°
69°
26
85°
71°
27
87°
71°
28
83°
71°
29
88°
71°
30
86°
71°
31
83°
71°
1
86°
69°
2
82°
68°
3
79°
60°
4
82°
54°
5
85°
58°
6
86°
64°
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 ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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.
