S
M
T
W
T
F
S
30
102°
79°
31
102°
73°
1
102°
72°
2
102°
70°
3
100°
75°
4
100°
71°
5
101°
71°
6
98°
69°
7
98°
76°
8
102°
77°
9
85°
64°
10
87°
63°
11
93°
68°
12
90°
69°
13
92°
67°
14
84°
58°
15
74°
53°
16
77°
56°
17
82°
59°
18
79°
58°
19
80°
58°
20
81°
54°
21
85°
61°
22
84°
60°
23
85°
61°
24
82°
61°
25
79°
60°
26
81°
59°
27
80°
59°
28
78°
60°
29
77°
59°
30
78°
51°
1
69°
46°
2
68°
44°
3
67°
43°
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 67° to 102°, with overnight lows between 43° and 77°. The average high for September is 82° with an average low of 59°. 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.
