S
M
T
W
T
F
S
30
75°
58°
31
75°
48°
1
72°
47°
2
66°
50°
3
68°
56°
4
71°
57°
5
74°
47°
6
72°
47°
7
65°
49°
8
71°
54°
9
72°
55°
10
67°
50°
11
64°
54°
12
66°
54°
13
67°
46°
14
63°
45°
15
62°
45°
16
63°
50°
17
65°
53°
18
67°
52°
19
66°
53°
20
71°
52°
21
68°
45°
22
64°
44°
23
59°
43°
24
58°
42°
25
57°
43°
26
60°
46°
27
Hist. Avg.
62°
44°
28
Hist. Avg.
62°
44°
29
Hist. Avg.
62°
43°
30
Hist. Avg.
61°
43°
1
Hist. Avg.
61°
43°
2
Hist. Avg.
60°
42°
3
Hist. Avg.
60°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in The Archipelago
The Archipelago's September 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 42° and 58°. The average high for September is 67° with an average low of 49°. 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 The Archipelago. See also: October | November | December.
