S
M
T
W
T
F
S
30
78°
56°
31
74°
65°
1
85°
68°
2
73°
68°
3
84°
67°
4
84°
68°
5
78°
60°
6
76°
56°
7
76°
53°
8
80°
51°
9
79°
57°
10
83°
68°
11
79°
56°
12
77°
52°
13
79°
66°
14
72°
51°
15
71°
46°
16
80°
54°
17
79°
65°
18
80°
50°
19
71°
57°
20
66°
55°
21
67°
53°
22
63°
51°
23
62°
52°
24
68°
51°
25
71°
50°
26
72°
48°
27
74°
52°
28
70°
53°
29
70°
50°
30
71°
46°
1
66°
49°
2
72°
51°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Delaware Water Gap
Delaware Water Gap's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 46° and 65°. The average high for September is 70° with an average low of 52°. 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 Delaware Water Gap. See also: October | November | December.
