S
M
T
W
T
F
S
30
73°
59°
31
81°
61°
1
77°
54°
2
77°
48°
3
82°
46°
4
66°
54°
5
72°
57°
6
82°
50°
7
79°
63°
8
77°
63°
9
70°
46°
10
77°
37°
11
77°
61°
12
61°
45°
13
63°
36°
14
57°
30°
15
63°
39°
16
68°
34°
17
64°
41°
18
66°
37°
19
68°
46°
20
63°
39°
21
63°
30°
22
64°
27°
23
66°
30°
24
57°
48°
25
64°
50°
26
68°
46°
27
70°
43°
28
72°
36°
29
63°
61°
30
73°
50°
1
59°
37°
2
57°
30°
3
61°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cook
Cook'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 Cook. See also: October | November | December.
