S
M
T
W
T
F
S
30
84°
63°
31
87°
65°
1
90°
65°
2
89°
66°
3
90°
66°
4
89°
59°
5
83°
64°
6
88°
66°
7
88°
65°
8
87°
64°
9
82°
65°
10
85°
64°
11
88°
65°
12
88°
64°
13
87°
64°
14
87°
63°
15
86°
64°
16
87°
63°
17
86°
56°
18
80°
56°
19
79°
54°
20
80°
54°
21
77°
53°
22
76°
54°
23
78°
57°
24
83°
56°
25
83°
59°
26
82°
59°
27
83°
58°
28
82°
57°
29
81°
56°
30
82°
56°
1
78°
54°
2
80°
56°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mortons Gap
Mortons Gap's September 2026 forecast shows daily high temperatures ranging from 75° to 90°, with overnight lows between 50° and 66°. The average high for September is 84° with an average low of 60°. 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 Mortons Gap. See also: October | November | December.