S
M
T
W
T
F
S
30
57°
50°
31
55°
50°
1
64°
45°
2
67°
41°
3
71°
38°
4
70°
38°
5
67°
38°
6
61°
52°
7
64°
51°
8
56°
54°
9
58°
47°
10
64°
44°
11
66°
39°
12
67°
36°
13
64°
40°
14
65°
42°
15
58°
49°
16
55°
46°
17
54°
46°
18
53°
47°
19
54°
49°
20
55°
50°
21
54°
46°
22
55°
47°
23
52°
45°
24
54°
44°
25
54°
46°
26
54°
47°
27
56°
46°
28
53°
43°
29
49°
42°
30
50°
42°
1
48°
43°
2
48°
41°
3
49°
40°
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 48° to 58°, with overnight lows between 40° and 50°. The average high for September is 53° with an average low of 45°. 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.
