S
M
T
W
T
F
S
30
84°
60°
31
85°
66°
1
86°
68°
2
92°
70°
3
91°
67°
4
82°
66°
5
79°
64°
6
78°
56°
7
80°
52°
8
84°
56°
9
86°
66°
10
78°
68°
11
82°
64°
12
85°
62°
13
82°
67°
14
71°
53°
15
81°
48°
16
87°
63°
17
82°
69°
18
76°
58°
19
77°
56°
20
73°
65°
21
66°
55°
22
64°
57°
23
66°
56°
24
68°
44°
25
N/A
26
72°
45°
27
N/A
28
64°
58°
29
70°
52°
30
77°
58°
1
83°
59°
2
65°
45°
3
69°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fredericktown
Fredericktown's September 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 45° and 59°. The average high for September is 71° with an average low of 54°. 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 Fredericktown. See also: October | November | December.