S
M
T
W
T
F
S
30
77°
62°
31
85°
65°
1
86°
65°
2
83°
64°
3
77°
65°
4
77°
65°
5
75°
59°
6
76°
56°
7
76°
49°
8
72°
58°
9
83°
57°
10
77°
53°
11
80°
54°
12
79°
52°
13
66°
41°
14
69°
62°
15
73°
52°
16
66°
56°
17
70°
54°
18
71°
55°
19
71°
52°
20
72°
48°
21
70°
50°
22
71°
51°
23
70°
53°
24
72°
54°
25
75°
55°
26
70°
45°
27
75°
52°
28
74°
52°
29
70°
52°
30
70°
51°
1
73°
50°
2
72°
49°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Prairie du Sac
Prairie du Sac's September 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 41° and 62°. The average high for September is 71° with an average low of 52°. 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 Prairie du Sac. See also: October | November | December.
