S
M
T
W
T
F
S
30
81°
62°
31
81°
63°
1
82°
63°
2
81°
62°
3
82°
63°
4
84°
61°
5
80°
53°
6
81°
55°
7
85°
58°
8
85°
58°
9
84°
57°
10
85°
58°
11
78°
52°
12
79°
55°
13
84°
58°
14
84°
51°
15
77°
51°
16
75°
50°
17
76°
49°
18
77°
51°
19
81°
51°
20
79°
52°
21
82°
56°
22
82°
57°
23
81°
55°
24
81°
53°
25
80°
54°
26
81°
56°
27
80°
54°
28
77°
53°
29
80°
53°
30
79°
52°
1
79°
53°
2
78°
52°
3
79°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pennington Gap
Pennington Gap's September 2026 forecast shows daily high temperatures ranging from 75° to 85°, with overnight lows between 45° and 63°. The average high for September is 81° with an average low of 55°. 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 Pennington Gap. See also: October | November | December.