S
M
T
W
T
F
S
30
90°
71°
31
91°
72°
1
90°
71°
2
89°
67°
3
89°
65°
4
87°
66°
5
88°
67°
6
89°
71°
7
91°
74°
8
95°
74°
9
95°
73°
10
94°
72°
11
92°
72°
12
89°
71°
13
92°
67°
14
93°
64°
15
86°
64°
16
89°
65°
17
87°
64°
18
88°
65°
19
88°
63°
20
89°
67°
21
91°
67°
22
87°
69°
23
85°
68°
24
86°
68°
25
83°
67°
26
84°
68°
27
87°
65°
28
88°
67°
29
88°
66°
30
87°
66°
1
88°
65°
2
88°
59°
3
89°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in DeSoto
DeSoto's September 2026 forecast shows daily high temperatures ranging from 83° to 95°, with overnight lows between 59° and 74°. The average high for September is 89° 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 DeSoto. See also: October | November | December.