S
M
T
W
T
F
S
30
79°
56°
31
65°
56°
1
70°
60°
2
73°
56°
3
72°
56°
4
73°
53°
5
77°
51°
6
76°
55°
7
89°
51°
8
93°
52°
9
94°
60°
10
100°
70°
11
84°
58°
12
75°
58°
13
78°
53°
14
86°
51°
15
80°
56°
16
65°
58°
17
67°
61°
18
81°
56°
19
83°
57°
20
72°
56°
21
75°
55°
22
79°
54°
23
84°
55°
24
90°
56°
25
84°
58°
26
82°
53°
27
80°
54°
28
80°
54°
29
79°
55°
30
80°
52°
1
79°
53°
2
75°
54°
3
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lafayette
Lafayette's September 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 52° and 58°. The average high for September is 80° with an average low of 55°. 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 Lafayette. See also: October | November | December.
