S
M
T
W
T
F
S
30
84°
65°
31
78°
68°
1
94°
71°
2
94°
71°
3
95°
73°
4
96°
72°
5
93°
72°
6
82°
62°
7
82°
61°
8
86°
59°
9
89°
67°
10
75°
63°
11
82°
60°
12
88°
66°
13
84°
61°
14
77°
53°
15
96°
64°
16
86°
71°
17
91°
71°
18
76°
66°
19
82°
67°
20
78°
59°
21
67°
55°
22
66°
53°
23
66°
52°
24
72°
55°
25
69°
55°
26
74°
54°
27
74°
51°
28
73°
50°
29
75°
52°
30
77°
53°
1
78°
45°
2
72°
54°
3
66°
54°
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 66° to 82°, with overnight lows between 45° and 67°. The average high for September is 73° 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.
