S
M
T
W
T
F
S
30
83°
67°
31
86°
67°
1
88°
67°
2
87°
70°
3
82°
70°
4
86°
68°
5
79°
62°
6
80°
58°
7
79°
55°
8
78°
60°
9
82°
60°
10
77°
54°
11
79°
54°
12
81°
56°
13
67°
44°
14
68°
40°
15
74°
58°
16
73°
54°
17
66°
57°
18
66°
55°
19
66°
60°
20
64°
54°
21
65°
50°
22
64°
46°
23
67°
44°
24
72°
54°
25
72°
47°
26
70°
41°
27
70°
40°
28
75°
46°
29
76°
46°
30
66°
59°
1
64°
53°
2
64°
39°
3
68°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Atkinson
Fort Atkinson's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Atkinson. See also: October | November | December.
