S
M
T
W
T
F
S
30
64°
46°
31
67°
47°
1
67°
47°
2
70°
46°
3
71°
47°
4
70°
47°
5
70°
46°
6
69°
47°
7
70°
46°
8
65°
40°
9
68°
45°
10
65°
43°
11
67°
41°
12
62°
43°
13
69°
40°
14
67°
44°
15
67°
39°
16
59°
41°
17
65°
43°
18
67°
43°
19
67°
42°
20
68°
41°
21
64°
41°
22
55°
44°
23
66°
41°
24
60°
39°
25
55°
35°
26
56°
38°
27
61°
40°
28
62°
40°
29
63°
36°
30
62°
27°
1
54°
32°
2
49°
37°
3
60°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gap
Gap's September 2026 forecast shows daily high temperatures ranging from 49° to 71°, with overnight lows between 27° and 47°. The average high for September is 64° with an average low of 42°. 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 Gap. See also: October | November | December.
