S
M
T
W
T
F
S
30
82°
66°
31
90°
71°
1
91°
73°
2
93°
73°
3
92°
73°
4
91°
71°
5
85°
68°
6
82°
60°
7
81°
61°
8
83°
70°
9
79°
66°
10
74°
56°
11
78°
62°
12
79°
64°
13
80°
63°
14
74°
61°
15
71°
60°
16
72°
56°
17
74°
58°
18
75°
57°
19
74°
54°
20
73°
55°
21
72°
60°
22
69°
59°
23
70°
59°
24
76°
58°
25
77°
60°
26
76°
59°
27
75°
59°
28
77°
60°
29
76°
60°
30
76°
59°
1
74°
55°
2
73°
50°
3
62°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Porter
Porter's September 2026 forecast shows daily high temperatures ranging from 62° to 83°, with overnight lows between 48° and 70°. The average high for September is 75° 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 Porter. See also: October | November | December.
