S
M
T
W
T
F
S
30
68°
54°
31
70°
54°
1
69°
53°
2
67°
53°
3
70°
54°
4
69°
53°
5
69°
55°
6
68°
56°
7
67°
53°
8
69°
55°
9
69°
51°
10
66°
50°
11
70°
51°
12
70°
56°
13
69°
54°
14
65°
54°
15
70°
58°
16
73°
58°
17
72°
57°
18
72°
48°
19
70°
47°
20
65°
47°
21
61°
53°
22
62°
54°
23
67°
54°
24
63°
53°
25
63°
45°
26
64°
44°
27
58°
44°
28
57°
45°
29
58°
45°
30
58°
47°
1
58°
50°
2
Hist. Avg.
61°
47°
3
Hist. Avg.
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kewaunee
Kewaunee's September 2026 forecast shows daily high temperatures ranging from 57° to 73°, with overnight lows between 44° and 58°. The average high for September is 66° 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 Kewaunee. See also: October | November | December.
