S
M
T
W
T
F
S
30
92°
69°
31
93°
69°
1
91°
70°
2
90°
69°
3
91°
71°
4
92°
72°
5
93°
71°
6
91°
69°
7
89°
70°
8
90°
70°
9
89°
71°
10
90°
68°
11
91°
69°
12
91°
69°
13
90°
68°
14
91°
69°
15
91°
70°
16
92°
69°
17
91°
68°
18
90°
69°
19
90°
69°
20
89°
67°
21
89°
66°
22
90°
68°
23
90°
68°
24
89°
64°
25
89°
63°
26
88°
63°
27
87°
67°
28
88°
65°
29
86°
64°
30
86°
66°
1
87°
64°
2
86°
65°
3
86°
66°
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 86° to 93°, with overnight lows between 63° and 72°. The average high for September is 90° with an average low of 68°. 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.
