S
M
T
W
T
F
S
30
86°
60°
31
87°
59°
1
87°
57°
2
86°
59°
3
90°
58°
4
89°
61°
5
90°
63°
6
87°
62°
7
86°
61°
8
91°
60°
9
86°
58°
10
82°
56°
11
82°
55°
12
83°
55°
13
83°
56°
14
80°
47°
15
84°
52°
16
84°
52°
17
85°
51°
18
84°
52°
19
83°
51°
20
84°
50°
21
83°
50°
22
84°
49°
23
83°
50°
24
83°
50°
25
82°
49°
26
81°
49°
27
80°
48°
28
80°
49°
29
79°
48°
30
78°
48°
1
78°
47°
2
77°
46°
3
78°
46°
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 77° to 91°, with overnight lows between 46° and 63°. The average high for September is 83° 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.
