S
M
T
W
T
F
S
30
90°
70°
31
94°
69°
1
97°
72°
2
99°
72°
3
98°
72°
4
96°
73°
5
96°
72°
6
91°
70°
7
87°
72°
8
89°
67°
9
90°
68°
10
90°
66°
11
91°
67°
12
88°
66°
13
86°
65°
14
87°
73°
15
86°
67°
16
82°
68°
17
79°
66°
18
82°
67°
19
81°
66°
20
78°
62°
21
79°
63°
22
80°
62°
23
80°
63°
24
83°
65°
25
84°
65°
26
76°
64°
27
75°
65°
28
75°
64°
29
76°
63°
30
78°
64°
1
74°
63°
2
74°
62°
3
75°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Anderson
Anderson's September 2026 forecast shows daily high temperatures ranging from 74° to 99°, with overnight lows between 62° and 73°. The average high for September is 84° with an average low of 67°. 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 Anderson. See also: October | November | December.