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
N/A
9
83°
53°
10
78°
53°
11
78°
60°
12
79°
56°
13
73°
60°
14
78°
58°
15
70°
49°
16
69°
51°
17
67°
48°
18
68°
47°
19
66°
48°
20
66°
48°
21
68°
50°
22
71°
47°
23
73°
52°
24
75°
53°
25
74°
53°
26
75°
53°
27
75°
52°
28
74°
53°
29
71°
52°
30
73°
49°
1
66°
48°
2
66°
49°
3
70°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Prairie du Sac
Prairie du Sac's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 47° and 60°. The average high for September is 72° 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.
