S
M
T
W
T
F
S
30
86°
61°
31
85°
58°
1
82°
58°
2
81°
59°
3
82°
59°
4
82°
60°
5
88°
64°
6
82°
66°
7
87°
63°
8
85°
57°
9
80°
57°
10
80°
56°
11
79°
56°
12
79°
58°
13
78°
57°
14
77°
56°
15
79°
57°
16
78°
60°
17
79°
55°
18
80°
59°
19
Hist. Avg.
79°
55°
20
Hist. Avg.
79°
54°
21
Hist. Avg.
78°
54°
22
Hist. Avg.
78°
54°
23
Hist. Avg.
78°
53°
24
Hist. Avg.
77°
53°
25
Hist. Avg.
77°
52°
26
Hist. Avg.
77°
52°
27
Hist. Avg.
76°
51°
28
Hist. Avg.
76°
51°
29
Hist. Avg.
76°
51°
30
Hist. Avg.
75°
50°
1
Hist. Avg.
75°
50°
2
Hist. Avg.
74°
49°
3
Hist. Avg.
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Knox
Fort Knox's September 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 55° and 66°. The average high for September is 81° with an average low of 59°. 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.
