S
M
T
W
T
F
S
30
77°
57°
31
76°
55°
1
74°
60°
2
74°
55°
3
75°
51°
4
73°
57°
5
73°
61°
6
80°
59°
7
82°
60°
8
81°
56°
9
80°
53°
10
73°
56°
11
73°
56°
12
70°
58°
13
80°
56°
14
80°
53°
15
Hist. Avg.
73°
51°
16
Hist. Avg.
73°
51°
17
Hist. Avg.
73°
50°
18
Hist. Avg.
72°
50°
19
Hist. Avg.
72°
50°
20
Hist. Avg.
71°
49°
21
Hist. Avg.
71°
49°
22
Hist. Avg.
71°
48°
23
Hist. Avg.
70°
48°
24
Hist. Avg.
70°
48°
25
Hist. Avg.
69°
47°
26
Hist. Avg.
69°
47°
27
Hist. Avg.
68°
46°
28
Hist. Avg.
68°
46°
29
Hist. Avg.
68°
46°
30
Hist. Avg.
67°
45°
1
Hist. Avg.
67°
45°
2
Hist. Avg.
66°
44°
3
Hist. Avg.
66°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Atkinson
Fort Atkinson's September 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 51° and 61°. The average high for September is 76° with an average low of 56°. 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.
