S
M
T
W
T
F
S
30
94°
73°
31
95°
72°
1
94°
73°
2
98°
73°
3
99°
74°
4
84°
77°
5
94°
75°
6
98°
75°
7
100°
75°
8
95°
74°
9
96°
70°
10
91°
73°
11
90°
73°
12
93°
72°
13
96°
74°
14
96°
73°
15
97°
72°
16
94°
73°
17
92°
69°
18
94°
64°
19
97°
68°
20
96°
72°
21
94°
70°
22
95°
71°
23
94°
68°
24
90°
67°
25
88°
64°
26
89°
66°
27
88°
64°
28
88°
63°
29
87°
65°
30
87°
64°
1
85°
64°
2
84°
61°
3
83°
65°
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 96°, with overnight lows between 61° and 72°. The average high for September is 89° with an average low of 66°. 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.
