S
M
T
W
T
F
S
30
95°
66°
31
96°
66°
1
97°
63°
2
94°
63°
3
94°
62°
4
93°
60°
5
92°
60°
6
93°
62°
7
93°
61°
8
92°
60°
9
90°
59°
10
90°
60°
11
91°
62°
12
95°
62°
13
96°
61°
14
96°
57°
15
88°
56°
16
88°
57°
17
90°
57°
18
94°
58°
19
95°
59°
20
95°
61°
21
94°
63°
22
95°
62°
23
96°
64°
24
94°
62°
25
86°
59°
26
83°
56°
27
82°
59°
28
85°
60°
29
89°
58°
30
85°
56°
1
81°
57°
2
79°
53°
3
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. George
St. George's September 2026 forecast shows daily high temperatures ranging from 79° to 97°, with overnight lows between 53° and 66°. The average high for September is 91° with an average low of 60°. 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 St. George. See also: October | November | December.
