S
M
T
W
T
F
S
30
70°
51°
31
69°
44°
1
66°
46°
2
62°
53°
3
64°
54°
4
70°
44°
5
66°
42°
6
61°
46°
7
63°
47°
8
66°
51°
9
65°
45°
10
59°
45°
11
58°
44°
12
58°
42°
13
56°
40°
14
56°
41°
15
58°
47°
16
59°
50°
17
58°
43°
18
63°
48°
19
57°
46°
20
60°
47°
21
58°
43°
22
55°
41°
23
54°
37°
24
55°
45°
25
55°
41°
26
55°
42°
27
62°
47°
28
62°
44°
29
Hist. Avg.
57°
43°
30
Hist. Avg.
57°
42°
1
Hist. Avg.
56°
42°
2
Hist. Avg.
56°
42°
3
Hist. Avg.
55°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Cook Ut
West Cook Ut's September 2026 forecast shows daily high temperatures ranging from 54° to 70°, with overnight lows between 37° and 54°. The average high for September is 61° with an average low of 45°. 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 West Cook Ut. See also: October | November | December.