S
M
T
W
T
F
S
30
90°
68°
31
95°
69°
1
96°
74°
2
97°
76°
3
97°
74°
4
98°
75°
5
97°
67°
6
85°
59°
7
84°
55°
8
90°
56°
9
88°
66°
10
77°
66°
11
83°
62°
12
90°
64°
13
81°
57°
14
81°
69°
15
96°
69°
16
93°
72°
17
87°
67°
18
89°
70°
19
88°
64°
20
73°
57°
21
72°
55°
22
75°
56°
23
78°
57°
24
79°
56°
25
80°
57°
26
76°
49°
27
80°
58°
28
78°
58°
29
76°
58°
30
79°
57°
1
76°
57°
2
77°
56°
3
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sangamon
Sangamon's September 2026 forecast shows daily high temperatures ranging from 72° to 96°, with overnight lows between 49° and 72°. The average high for September is 80° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Sangamon. See also: October | November | December.
