S
M
T
W
T
F
S
30
93°
77°
31
91°
76°
1
90°
75°
2
92°
77°
3
93°
77°
4
94°
76°
5
90°
76°
6
92°
75°
7
92°
76°
8
91°
75°
9
93°
75°
10
93°
74°
11
92°
75°
12
92°
74°
13
91°
75°
14
91°
72°
15
91°
71°
16
91°
73°
17
92°
74°
18
88°
72°
19
91°
73°
20
91°
71°
21
89°
72°
22
88°
71°
23
90°
70°
24
89°
70°
25
90°
71°
26
90°
70°
27
89°
70°
28
87°
69°
29
89°
70°
30
89°
69°
1
88°
69°
2
88°
64°
3
85°
62°
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 85° to 94°, with overnight lows between 62° and 77°. The average high for September is 90° with an average low of 72°. 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.
