S
M
T
W
T
F
S
30
92°
65°
31
93°
64°
1
92°
65°
2
93°
68°
3
95°
68°
4
95°
67°
5
93°
65°
6
94°
64°
7
93°
66°
8
92°
65°
9
92°
63°
10
89°
63°
11
89°
62°
12
88°
62°
13
90°
61°
14
89°
64°
15
90°
60°
16
88°
60°
17
89°
63°
18
90°
63°
19
90°
62°
20
Hist. Avg.
88°
57°
21
Hist. Avg.
88°
57°
22
Hist. Avg.
88°
56°
23
Hist. Avg.
87°
56°
24
Hist. Avg.
87°
56°
25
Hist. Avg.
87°
55°
26
Hist. Avg.
87°
55°
27
Hist. Avg.
86°
54°
28
Hist. Avg.
86°
54°
29
Hist. Avg.
86°
54°
30
Hist. Avg.
86°
53°
1
Hist. Avg.
85°
53°
2
Hist. Avg.
85°
52°
3
Hist. Avg.
85°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Douglas
Douglas's September 2026 forecast shows daily high temperatures ranging from 88° to 95°, with overnight lows between 60° and 68°. The average high for September is 91° with an average low of 64°. 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.