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
102°
72°
8
101°
75°
9
86°
66°
10
87°
63°
11
90°
71°
12
85°
69°
13
88°
73°
14
92°
62°
15
74°
56°
16
77°
59°
17
79°
56°
18
75°
55°
19
76°
53°
20
75°
55°
21
79°
54°
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 101°, with overnight lows between 43° and 75°. The average high for September is 80° 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.
