S
M
T
W
T
F
S
30
81°
61°
31
84°
52°
1
75°
52°
2
72°
58°
3
73°
62°
4
81°
53°
5
82°
50°
6
73°
51°
7
72°
55°
8
73°
59°
9
72°
56°
10
71°
58°
11
71°
53°
12
72°
50°
13
69°
47°
14
69°
49°
15
70°
55°
16
68°
59°
17
76°
58°
18
79°
57°
19
78°
55°
20
74°
51°
21
75°
49°
22
71°
47°
23
65°
44°
24
66°
45°
25
66°
46°
26
65°
45°
27
74°
54°
28
75°
53°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lafayette
Lafayette's September 2026 forecast shows daily high temperatures ranging from 65° to 84°, with overnight lows between 44° and 62°. The average high for September is 73° with an average low of 53°. 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.
