S
M
T
W
T
F
S
30
94°
65°
31
95°
71°
1
97°
70°
2
98°
71°
3
99°
72°
4
99°
72°
5
97°
74°
6
88°
69°
7
88°
62°
8
93°
66°
9
97°
72°
10
82°
71°
11
82°
70°
12
89°
70°
13
92°
67°
14
83°
62°
15
96°
63°
16
94°
74°
17
95°
74°
18
95°
72°
19
94°
71°
20
93°
71°
21
85°
67°
22
74°
60°
23
70°
60°
24
73°
57°
25
75°
50°
26
76°
51°
27
80°
55°
28
76°
52°
29
78°
58°
30
76°
57°
1
74°
54°
2
77°
49°
3
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Knox
Fort Knox's September 2026 forecast shows daily high temperatures ranging from 70° to 80°, with overnight lows between 49° and 60°. The average high for September is 75° 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 Fort Knox. See also: October | November | December.
