S
M
T
W
T
F
S
30
100°
74°
31
99°
77°
1
100°
83°
2
100°
79°
3
100°
78°
4
100°
76°
5
103°
77°
6
104°
73°
7
101°
76°
8
102°
79°
9
101°
72°
10
80°
69°
11
89°
72°
12
88°
71°
13
94°
77°
14
95°
74°
15
90°
69°
16
89°
69°
17
87°
63°
18
85°
63°
19
78°
57°
20
76°
56°
21
77°
57°
22
76°
58°
23
85°
63°
24
84°
64°
25
85°
64°
26
84°
63°
27
84°
63°
28
83°
62°
29
82°
62°
30
82°
61°
1
81°
59°
2
82°
61°
3
82°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carterville
Carterville's September 2026 forecast shows daily high temperatures ranging from 76° to 101°, with overnight lows between 56° and 77°. The average high for September is 85° with an average low of 64°. 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 Carterville. See also: October | November | December.
