S
M
T
W
T
F
S
30
92°
73°
31
91°
73°
1
90°
72°
2
92°
74°
3
93°
73°
4
92°
73°
5
90°
72°
6
91°
72°
7
91°
71°
8
90°
72°
9
92°
72°
10
92°
71°
11
91°
72°
12
91°
72°
13
90°
70°
14
86°
69°
15
89°
69°
16
92°
71°
17
93°
70°
18
92°
67°
19
90°
64°
20
84°
64°
21
84°
67°
22
86°
66°
23
88°
63°
24
89°
65°
25
89°
64°
26
88°
66°
27
83°
65°
28
83°
63°
29
84°
63°
30
86°
64°
1
87°
63°
2
86°
63°
3
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hattiesburg
Hattiesburg's September 2026 forecast shows daily high temperatures ranging from 83° to 93°, with overnight lows between 62° 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 Hattiesburg. See also: October | November | December.
