S
M
T
W
T
F
S
30
84°
65°
31
91°
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
77°
68°
19
82°
66°
20
81°
60°
21
68°
60°
22
69°
55°
23
63°
58°
24
74°
59°
25
70°
54°
26
74°
51°
27
76°
43°
28
77°
44°
29
81°
48°
30
75°
58°
1
89°
64°
2
72°
45°
3
71°
44°
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 71° to 72°, with overnight lows between 44° and 45°. The average high for September is 72° with an average low of 45°. 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.
