S
M
T
W
T
F
S
30
96°
72°
31
99°
73°
1
100°
79°
2
100°
82°
3
99°
82°
4
100°
81°
5
101°
81°
6
90°
73°
7
87°
65°
8
93°
65°
9
94°
73°
10
77°
65°
11
84°
66°
12
87°
68°
13
89°
70°
14
94°
72°
15
85°
66°
16
83°
65°
17
86°
63°
18
83°
63°
19
75°
55°
20
75°
57°
21
74°
58°
22
78°
57°
23
80°
62°
24
83°
63°
25
82°
63°
26
82°
62°
27
81°
62°
28
82°
61°
29
80°
62°
30
80°
60°
1
79°
54°
2
78°
60°
3
80°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Des Peres
Des Peres's September 2026 forecast shows daily high temperatures ranging from 74° to 94°, with overnight lows between 54° and 73°. The average high for September is 82° with an average low of 63°. 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 Des Peres. See also: October | November | December.
