S
M
T
W
T
F
S
26
78°
44°
27
65°
58°
28
62°
53°
29
61°
44°
30
62°
38°
1
58°
43°
2
58°
40°
3
68°
40°
4
76°
54°
5
59°
47°
6
59°
41°
7
65°
37°
8
66°
49°
9
76°
49°
10
68°
47°
11
71°
42°
12
80°
45°
13
70°
46°
14
70°
41°
15
77°
51°
16
74°
66°
17
82°
66°
18
75°
61°
19
77°
59°
20
68°
48°
21
72°
53°
22
66°
58°
23
77°
62°
24
74°
60°
25
80°
62°
26
80°
64°
27
82°
63°
28
81°
62°
29
83°
64°
30
83°
65°
31
82°
63°
1
80°
64°
2
88°
65°
3
82°
64°
4
78°
63°
5
80°
63°
6
79°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sangamon
Sangamon's May 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 48° and 65°. The average high for May is 79° with an average low of 62°. 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 Sangamon. See also: June | July | August.
