S
M
T
W
T
F
S
30
98°
78°
31
89°
68°
1
94°
67°
2
95°
70°
3
95°
68°
4
96°
69°
5
97°
70°
6
82°
68°
7
90°
62°
8
96°
65°
9
102°
68°
10
104°
85°
11
103°
78°
12
100°
83°
13
98°
79°
14
99°
73°
15
97°
73°
16
96°
71°
17
95°
70°
18
97°
67°
19
93°
62°
20
90°
63°
21
93°
64°
22
91°
63°
23
91°
63°
24
89°
62°
25
92°
64°
26
91°
63°
27
88°
57°
28
84°
51°
29
81°
50°
30
84°
56°
1
85°
58°
2
85°
55°
3
79°
53°
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 99°, with overnight lows between 50° and 73°. The average high for September is 90° with an average low of 62°. 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.
