S
M
T
W
T
F
S
30
78°
69°
31
91°
73°
1
95°
72°
2
96°
72°
3
94°
70°
4
96°
71°
5
91°
70°
6
84°
60°
7
82°
58°
8
88°
69°
9
79°
64°
10
80°
55°
11
80°
64°
12
82°
62°
13
76°
61°
14
79°
60°
15
75°
53°
16
74°
52°
17
75°
54°
18
71°
50°
19
72°
47°
20
73°
51°
21
75°
50°
22
74°
55°
23
75°
55°
24
78°
54°
25
79°
56°
26
79°
56°
27
78°
55°
28
79°
57°
29
78°
56°
30
76°
55°
1
74°
50°
2
64°
44°
3
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kewanee
Kewanee's September 2026 forecast shows daily high temperatures ranging from 63° to 88°, with overnight lows between 41° and 69°. The average high for September is 76° with an average low of 55°. 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 Kewanee. See also: October | November | December.
