S
M
T
W
T
F
S
30
82°
61°
31
82°
61°
1
81°
57°
2
75°
53°
3
74°
53°
4
74°
54°
5
75°
52°
6
78°
59°
7
81°
60°
8
80°
59°
9
78°
59°
10
80°
58°
11
81°
59°
12
80°
59°
13
81°
60°
14
81°
50°
15
72°
50°
16
69°
49°
17
72°
50°
18
70°
48°
19
71°
47°
20
70°
48°
21
76°
50°
22
76°
54°
23
75°
46°
24
76°
45°
25
69°
44°
26
69°
47°
27
71°
52°
28
73°
52°
29
73°
42°
30
67°
43°
1
65°
49°
2
66°
49°
3
70°
48°
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 65° to 82°, with overnight lows between 42° and 61°. The average high for September is 75° 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.
