S
M
T
W
T
F
S
30
95°
71°
31
97°
73°
1
96°
76°
2
96°
72°
3
95°
72°
4
92°
73°
5
91°
73°
6
95°
74°
7
95°
74°
8
98°
72°
9
97°
73°
10
95°
74°
11
95°
73°
12
93°
72°
13
92°
69°
14
93°
70°
15
89°
66°
16
86°
69°
17
86°
68°
18
87°
69°
19
90°
68°
20
89°
69°
21
91°
69°
22
91°
68°
23
90°
68°
24
90°
67°
25
88°
68°
26
83°
66°
27
82°
62°
28
81°
58°
29
80°
57°
30
80°
58°
1
81°
57°
2
84°
58°
3
79°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Gibson
Port Gibson's September 2026 forecast shows daily high temperatures ranging from 79° to 98°, with overnight lows between 56° and 74°. The average high for September is 89° with an average low of 68°. 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 Gibson. See also: October | November | December.
