S
M
T
W
T
F
S
30
64°
52°
31
64°
50°
1
65°
52°
2
63°
52°
3
63°
50°
4
64°
49°
5
63°
51°
6
64°
50°
7
66°
52°
8
65°
55°
9
66°
53°
10
62°
54°
11
64°
54°
12
62°
53°
13
66°
54°
14
65°
54°
15
66°
52°
16
64°
51°
17
60°
51°
18
60°
49°
19
62°
47°
20
61°
47°
21
60°
46°
22
60°
48°
23
59°
49°
24
60°
50°
25
59°
52°
26
59°
52°
27
62°
51°
28
60°
48°
29
58°
48°
30
58°
47°
1
57°
46°
2
57°
46°
3
59°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Runswick Bay
Runswick Bay's September 2026 forecast shows daily high temperatures ranging from 57° to 66°, with overnight lows between 46° and 55°. The average high for September is 62° with an average low of 50°. 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 Runswick Bay. See also: October | November | December.
