S
M
T
W
T
F
S
30
98°
78°
31
89°
68°
1
94°
71°
2
96°
67°
3
97°
68°
4
96°
72°
5
93°
72°
6
84°
70°
7
92°
71°
8
94°
70°
9
95°
69°
10
97°
70°
11
99°
71°
12
97°
68°
13
96°
69°
14
93°
62°
15
97°
67°
16
97°
67°
17
96°
66°
18
96°
63°
19
93°
61°
20
93°
59°
21
92°
60°
22
94°
62°
23
94°
63°
24
93°
62°
25
83°
54°
26
82°
55°
27
81°
51°
28
81°
51°
29
84°
53°
30
85°
56°
1
85°
54°
2
86°
56°
3
86°
56°
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 81° to 99°, with overnight lows between 51° and 72°. The average high for September is 92° with an average low of 63°. 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.
