S
M
T
W
T
F
S
30
89°
58°
31
81°
58°
1
81°
64°
2
87°
59°
3
87°
63°
4
85°
65°
5
89°
62°
6
88°
56°
7
79°
55°
8
79°
55°
9
80°
61°
10
85°
61°
11
85°
56°
12
79°
55°
13
77°
54°
14
78°
60°
15
83°
55°
16
85°
52°
17
77°
51°
18
75°
51°
19
75°
52°
20
76°
51°
21
73°
50°
22
72°
51°
23
74°
50°
24
74°
55°
25
78°
56°
26
79°
56°
27
80°
51°
28
76°
56°
29
77°
56°
30
77°
52°
1
72°
53°
2
73°
49°
3
70°
46°
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 89°, with overnight lows between 46° and 65°. The average high for September is 79° 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.
