S
M
T
W
T
F
S
30
88°
75°
31
90°
75°
1
89°
77°
2
88°
75°
3
90°
75°
4
90°
74°
5
90°
74°
6
90°
74°
7
90°
76°
8
91°
75°
9
89°
75°
10
82°
75°
11
88°
73°
12
86°
73°
13
94°
73°
14
92°
74°
15
94°
72°
16
90°
76°
17
92°
67°
18
93°
68°
19
94°
73°
20
93°
73°
21
92°
72°
22
94°
72°
23
93°
71°
24
91°
69°
25
90°
71°
26
90°
70°
27
90°
70°
28
91°
69°
29
89°
70°
30
86°
67°
1
86°
71°
2
82°
70°
3
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lafourche Crossing
Lafourche Crossing's September 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 67° and 73°. The average high for September is 90° with an average low of 70°. 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 Lafourche Crossing. See also: October | November | December.
