S
M
T
W
T
F
S
30
91°
70°
31
N/A
1
95°
74°
2
93°
72°
3
94°
73°
4
91°
72°
5
96°
70°
6
91°
68°
7
87°
69°
8
91°
68°
9
90°
65°
10
91°
70°
11
92°
64°
12
85°
67°
13
86°
66°
14
86°
67°
15
85°
66°
16
79°
66°
17
79°
64°
18
82°
66°
19
81°
64°
20
77°
62°
21
80°
61°
22
79°
60°
23
80°
61°
24
82°
63°
25
83°
63°
26
76°
62°
27
74°
63°
28
75°
63°
29
74°
62°
30
78°
62°
1
74°
61°
2
73°
61°
3
74°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Kirkwood
South Kirkwood's September 2026 forecast shows daily high temperatures ranging from 73° to 96°, with overnight lows between 60° and 74°. The average high for September is 83° with an average low of 65°. 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 South Kirkwood. See also: October | November | December.