S
M
T
W
T
F
S
30
95°
69°
31
97°
70°
1
97°
73°
2
96°
70°
3
96°
70°
4
95°
72°
5
95°
72°
6
94°
71°
7
95°
71°
8
95°
72°
9
93°
71°
10
94°
71°
11
93°
70°
12
94°
70°
13
94°
69°
14
93°
69°
15
92°
68°
16
86°
64°
17
85°
68°
18
89°
68°
19
85°
67°
20
85°
66°
21
86°
66°
22
84°
65°
23
87°
66°
24
88°
66°
25
90°
65°
26
90°
65°
27
89°
63°
28
89°
63°
29
88°
62°
30
88°
63°
1
86°
61°
2
88°
64°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Retreat
Retreat's September 2026 forecast shows daily high temperatures ranging from 80° to 97°, with overnight lows between 57° and 73°. The average high for September is 91° with an average low of 67°. 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 Retreat. See also: October | November | December.
