S
M
T
W
T
F
S
30
81°
52°
31
75°
64°
1
90°
66°
2
71°
67°
3
88°
66°
4
82°
68°
5
79°
60°
6
79°
57°
7
78°
51°
8
83°
50°
9
82°
56°
10
84°
66°
11
80°
54°
12
74°
50°
13
81°
63°
14
74°
47°
15
75°
53°
16
81°
63°
17
83°
64°
18
77°
56°
19
71°
59°
20
67°
54°
21
66°
50°
22
65°
53°
23
67°
51°
24
69°
51°
25
71°
52°
26
70°
48°
27
73°
54°
28
73°
53°
29
73°
50°
30
68°
47°
1
66°
51°
2
68°
51°
3
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Normal Square
Normal Square's September 2026 forecast shows daily high temperatures ranging from 65° to 83°, with overnight lows between 46° and 64°. The average high for September is 72° with an average low of 53°. 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 Square. See also: October | November | December.
