S
M
T
W
T
F
S
30
94°
67°
31
94°
69°
1
99°
72°
2
98°
69°
3
100°
71°
4
100°
71°
5
98°
70°
6
87°
68°
7
89°
63°
8
94°
70°
9
92°
71°
10
92°
70°
11
85°
68°
12
87°
66°
13
90°
71°
14
92°
70°
15
87°
70°
16
82°
66°
17
80°
63°
18
78°
59°
19
78°
58°
20
76°
59°
21
80°
58°
22
80°
63°
23
83°
63°
24
84°
64°
25
84°
64°
26
83°
63°
27
84°
63°
28
83°
62°
29
83°
63°
30
82°
63°
1
83°
60°
2
80°
53°
3
70°
49°
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 70° to 94°, with overnight lows between 49° and 71°. The average high for September is 84° with an average low of 63°. 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.
