S
M
T
W
T
F
S
30
91°
72°
31
93°
73°
1
95°
74°
2
96°
73°
3
94°
74°
4
91°
75°
5
90°
75°
6
95°
73°
7
96°
72°
8
92°
73°
9
93°
71°
10
91°
73°
11
80°
74°
12
87°
73°
13
92°
71°
14
95°
72°
15
95°
71°
16
91°
71°
17
90°
66°
18
93°
65°
19
96°
70°
20
91°
70°
21
92°
69°
22
92°
70°
23
90°
69°
24
83°
63°
25
84°
59°
26
84°
61°
27
89°
60°
28
86°
63°
29
87°
67°
30
88°
69°
1
81°
68°
2
83°
69°
3
82°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Opp
Opp's September 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 59° and 69°. The average high for September is 85° with an average low of 65°. 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 Opp. See also: October | November | December.
