S
M
T
W
T
F
S
30
87°
58°
31
91°
61°
1
94°
58°
2
92°
59°
3
91°
58°
4
90°
58°
5
88°
59°
6
87°
56°
7
88°
56°
8
87°
56°
9
88°
55°
10
87°
54°
11
86°
54°
12
87°
53°
13
87°
54°
14
86°
54°
15
86°
53°
16
85°
53°
17
85°
51°
18
80°
47°
19
82°
49°
20
83°
50°
21
83°
50°
22
82°
49°
23
82°
50°
24
81°
48°
25
79°
48°
26
79°
47°
27
78°
48°
28
79°
47°
29
79°
46°
30
78°
47°
1
79°
46°
2
79°
47°
3
77°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar City
Cedar City's September 2026 forecast shows daily high temperatures ranging from 77° to 94°, with overnight lows between 46° and 61°. The average high for September is 84° 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 Cedar City. See also: October | November | December.