S
M
T
W
T
F
S
30
82°
59°
31
84°
58°
1
82°
52°
2
76°
50°
3
74°
57°
4
72°
58°
5
83°
47°
6
75°
45°
7
70°
46°
8
71°
55°
9
74°
54°
10
77°
55°
11
76°
54°
12
79°
50°
13
74°
45°
14
70°
41°
15
66°
43°
16
68°
43°
17
70°
51°
18
76°
40°
19
68°
43°
20
66°
51°
21
72°
53°
22
78°
50°
23
75°
53°
24
75°
52°
25
76°
51°
26
77°
43°
27
73°
41°
28
63°
44°
29
62°
45°
30
60°
42°
1
66°
44°
2
61°
48°
3
58°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mound City
Mound City's September 2026 forecast shows daily high temperatures ranging from 58° to 84°, with overnight lows between 37° and 59°. The average high for September is 72° with an average low of 49°. 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 Mound City. See also: October | November | December.
