S
M
T
W
T
F
S
30
79°
57°
31
83°
56°
1
85°
59°
2
84°
61°
3
86°
62°
4
84°
53°
5
84°
58°
6
83°
61°
7
81°
59°
8
86°
60°
9
87°
60°
10
88°
59°
11
87°
60°
12
86°
60°
13
85°
59°
14
84°
59°
15
84°
58°
16
81°
59°
17
80°
56°
18
81°
51°
19
78°
49°
20
75°
48°
21
74°
50°
22
76°
46°
23
72°
47°
24
72°
54°
25
71°
54°
26
77°
53°
27
72°
55°
28
72°
55°
29
77°
54°
30
75°
43°
1
74°
42°
2
67°
41°
3
66°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Normal
Normal's September 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 40° and 62°. The average high for September is 79° with an average low of 54°. 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 Normal. See also: October | November | December.
