S
M
T
W
T
F
S
30
81°
61°
31
83°
60°
1
83°
53°
2
81°
57°
3
81°
56°
4
74°
57°
5
75°
55°
6
78°
56°
7
78°
50°
8
74°
49°
9
74°
55°
10
73°
58°
11
80°
56°
12
79°
57°
13
79°
56°
14
80°
55°
15
79°
56°
16
Hist. Avg.
75°
52°
17
Hist. Avg.
74°
51°
18
Hist. Avg.
74°
51°
19
Hist. Avg.
74°
51°
20
Hist. Avg.
73°
50°
21
Hist. Avg.
73°
50°
22
Hist. Avg.
73°
49°
23
Hist. Avg.
72°
49°
24
Hist. Avg.
72°
49°
25
Hist. Avg.
71°
48°
26
Hist. Avg.
71°
48°
27
Hist. Avg.
70°
47°
28
Hist. Avg.
70°
47°
29
Hist. Avg.
70°
47°
30
Hist. Avg.
69°
46°
1
Hist. Avg.
69°
46°
2
Hist. Avg.
68°
45°
3
Hist. Avg.
68°
45°
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 73° to 83°, with overnight lows between 49° and 61°. The average high for September is 78° with an average low of 56°. 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.
