S
M
T
W
T
F
S
30
91°
69°
31
90°
72°
1
91°
72°
2
91°
71°
3
87°
72°
4
87°
72°
5
86°
71°
6
86°
68°
7
87°
66°
8
86°
66°
9
90°
69°
10
89°
69°
11
91°
65°
12
86°
65°
13
86°
66°
14
89°
65°
15
86°
64°
16
88°
65°
17
89°
66°
18
89°
64°
19
88°
68°
20
89°
64°
21
84°
62°
22
83°
64°
23
82°
67°
24
82°
67°
25
82°
66°
26
82°
66°
27
83°
63°
28
83°
61°
29
85°
62°
30
86°
63°
1
86°
64°
2
85°
63°
3
84°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Douglas
Douglas's September 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 57° and 72°. The average high for September is 87° with an average low of 66°. 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 Douglas. See also: October | November | December.
