S
M
T
W
T
F
S
30
86°
73°
31
90°
72°
1
93°
70°
2
95°
72°
3
93°
72°
4
91°
73°
5
95°
73°
6
94°
72°
7
80°
68°
8
84°
68°
9
87°
69°
10
86°
70°
11
88°
70°
12
86°
69°
13
86°
68°
14
88°
67°
15
86°
63°
16
84°
64°
17
83°
62°
18
86°
64°
19
84°
63°
20
85°
66°
21
86°
67°
22
86°
66°
23
85°
66°
24
85°
65°
25
84°
65°
26
85°
64°
27
85°
65°
28
84°
65°
29
84°
64°
30
83°
64°
1
83°
63°
2
82°
62°
3
83°
63°
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 80° to 94°, with overnight lows between 62° and 72°. The average high for September is 85° with an average low of 66°. 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.
