S
M
T
W
T
F
S
30
82°
57°
31
83°
57°
1
82°
54°
2
82°
55°
3
84°
55°
4
79°
56°
5
79°
56°
6
80°
53°
7
84°
57°
8
85°
57°
9
85°
58°
10
84°
58°
11
85°
57°
12
83°
57°
13
80°
56°
14
78°
55°
15
78°
55°
16
81°
57°
17
84°
59°
18
85°
57°
19
84°
56°
20
84°
57°
21
83°
57°
22
84°
56°
23
81°
55°
24
80°
54°
25
83°
56°
26
83°
56°
27
82°
55°
28
82°
56°
29
80°
52°
30
82°
55°
1
78°
52°
2
73°
48°
3
74°
48°
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 73° to 85°, with overnight lows between 48° and 59°. The average high for September is 82° 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.
