S
M
T
W
T
F
S
30
93°
80°
31
94°
77°
1
93°
76°
2
92°
84°
3
93°
85°
4
93°
83°
5
92°
79°
6
93°
79°
7
90°
82°
8
90°
80°
9
88°
80°
10
88°
83°
11
91°
84°
12
92°
80°
13
91°
79°
14
92°
80°
15
90°
78°
16
91°
77°
17
90°
77°
18
91°
79°
19
90°
76°
20
87°
75°
21
86°
79°
22
87°
78°
23
85°
78°
24
84°
77°
25
84°
78°
26
85°
78°
27
84°
77°
28
85°
78°
29
86°
78°
30
85°
76°
1
83°
70°
2
81°
71°
3
81°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port O'Connor
Port O'Connor's September 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 70° and 84°. The average high for September is 87° with an average low of 78°. 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 Port O'Connor. See also: October | November | December.
