S
M
T
W
T
F
S
30
91°
73°
31
93°
74°
1
91°
75°
2
89°
71°
3
89°
70°
4
88°
71°
5
88°
71°
6
89°
73°
7
92°
75°
8
90°
75°
9
90°
74°
10
89°
73°
11
91°
73°
12
89°
74°
13
90°
73°
14
92°
68°
15
89°
68°
16
88°
69°
17
87°
68°
18
88°
69°
19
88°
71°
20
91°
71°
21
87°
70°
22
86°
71°
23
86°
71°
24
87°
70°
25
86°
70°
26
87°
69°
27
87°
70°
28
88°
70°
29
88°
69°
30
87°
69°
1
89°
68°
2
89°
69°
3
88°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Neches
Port Neches's September 2026 forecast shows daily high temperatures ranging from 86° to 93°, with overnight lows between 64° and 75°. The average high for September is 89° with an average low of 71°. 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 Neches. See also: October | November | December.
