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
82°
51°
19
80°
57°
20
66°
56°
21
67°
57°
22
73°
57°
23
79°
50°
24
91°
54°
25
80°
59°
26
76°
54°
27
70°
56°
28
80°
54°
29
94°
50°
30
84°
55°
1
91°
55°
2
88°
57°
3
99°
65°
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 99° to 99°, with overnight lows between 65° and 65°. The average high for September is 99° with an average low of 65°. 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.
