S
M
T
W
T
F
S
30
81°
66°
31
90°
68°
1
92°
69°
2
91°
70°
3
91°
72°
4
91°
70°
5
88°
70°
6
81°
57°
7
81°
55°
8
84°
55°
9
79°
64°
10
72°
55°
11
81°
54°
12
88°
61°
13
77°
54°
14
73°
46°
15
95°
64°
16
82°
70°
17
88°
70°
18
77°
64°
19
73°
63°
20
75°
59°
21
64°
59°
22
68°
50°
23
N/A
24
72°
54°
25
66°
52°
26
73°
45°
27
73°
41°
28
77°
45°
29
81°
45°
30
68°
61°
1
86°
61°
2
68°
45°
3
70°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in DeMotte
DeMotte's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 DeMotte. See also: October | November | December.