S
M
T
W
T
F
S
30
95°
71°
31
97°
73°
1
91°
73°
2
96°
72°
3
94°
74°
4
92°
73°
5
91°
70°
6
95°
74°
7
95°
74°
8
98°
72°
9
97°
73°
10
95°
74°
11
92°
70°
12
93°
68°
13
92°
70°
14
90°
66°
15
85°
70°
16
86°
69°
17
86°
68°
18
88°
69°
19
88°
69°
20
85°
68°
21
84°
68°
22
86°
67°
23
88°
67°
24
87°
66°
25
90°
67°
26
89°
66°
27
90°
65°
28
90°
65°
29
89°
64°
30
90°
66°
1
89°
65°
2
86°
65°
3
86°
64°
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 84° to 98°, with overnight lows between 64° and 74°. The average high for September is 90° with an average low of 69°. 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.
