S
M
T
W
T
F
S
30
69°
55°
31
69°
55°
1
68°
51°
2
69°
50°
3
69°
52°
4
68°
54°
5
66°
47°
6
63°
53°
7
67°
54°
8
69°
55°
9
70°
54°
10
63°
46°
11
61°
48°
12
67°
51°
13
69°
54°
14
70°
53°
15
71°
51°
16
63°
47°
17
62°
49°
18
68°
49°
19
63°
48°
20
66°
48°
21
Hist. Avg.
67°
50°
22
Hist. Avg.
67°
50°
23
Hist. Avg.
67°
49°
24
Hist. Avg.
66°
49°
25
Hist. Avg.
66°
49°
26
Hist. Avg.
66°
49°
27
Hist. Avg.
66°
49°
28
Hist. Avg.
65°
48°
29
Hist. Avg.
65°
48°
30
Hist. Avg.
65°
48°
1
Hist. Avg.
65°
48°
2
Hist. Avg.
64°
48°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Arch Cape
Arch Cape's September 2026 forecast shows daily high temperatures ranging from 61° to 71°, with overnight lows between 46° and 55°. The average high for September is 67° with an average low of 51°. 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 Arch Cape. See also: October | November | December.
