S
M
T
W
T
F
S
30
96°
69°
31
96°
72°
1
96°
74°
2
96°
74°
3
96°
73°
4
95°
73°
5
92°
74°
6
95°
74°
7
98°
76°
8
99°
75°
9
97°
74°
10
95°
72°
11
90°
70°
12
92°
69°
13
91°
68°
14
88°
66°
15
84°
70°
16
85°
69°
17
87°
69°
18
88°
68°
19
88°
69°
20
85°
69°
21
83°
68°
22
84°
68°
23
87°
67°
24
87°
67°
25
88°
66°
26
88°
67°
27
89°
66°
28
88°
65°
29
87°
64°
30
88°
66°
1
87°
65°
2
86°
65°
3
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Columbia
Columbia's September 2026 forecast shows daily high temperatures ranging from 83° to 99°, with overnight lows between 64° and 76°. The average high for September is 90° with an average low of 69°. 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 Columbia. See also: October | November | December.
