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
95°
70°
7
90°
72°
8
88°
68°
9
90°
70°
10
91°
70°
11
89°
72°
12
88°
73°
13
90°
72°
14
92°
72°
15
87°
67°
16
88°
64°
17
87°
68°
18
85°
69°
19
82°
66°
20
81°
61°
21
76°
60°
22
78°
61°
23
80°
62°
24
82°
61°
25
82°
64°
26
80°
61°
27
80°
64°
28
83°
64°
29
84°
63°
30
84°
64°
1
83°
64°
2
83°
63°
3
82°
62°
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 76° to 92°, with overnight lows between 60° and 73°. The average high for September is 84° with an average low of 65°. 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.
