S
M
T
W
T
F
S
30
84°
64°
31
83°
57°
1
79°
56°
2
76°
58°
3
77°
57°
4
78°
57°
5
77°
58°
6
75°
56°
7
75°
56°
8
76°
59°
9
75°
56°
10
74°
55°
11
75°
56°
12
76°
55°
13
75°
56°
14
74°
55°
15
73°
57°
16
74°
53°
17
73°
54°
18
72°
54°
19
72°
59°
20
71°
58°
21
73°
51°
22
69°
50°
23
Hist. Avg.
73°
51°
24
Hist. Avg.
73°
51°
25
Hist. Avg.
72°
50°
26
Hist. Avg.
72°
50°
27
Hist. Avg.
71°
49°
28
Hist. Avg.
71°
49°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
48°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
69°
47°
3
Hist. Avg.
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Gap
Gap's September 2026 forecast shows daily high temperatures ranging from 69° to 84°, with overnight lows between 50° and 64°. The average high for September is 75° with an average low of 56°. 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.
