S
M
T
W
T
F
S
30
94°
75°
31
91°
75°
1
85°
76°
2
89°
76°
3
93°
76°
4
91°
75°
5
91°
76°
6
92°
74°
7
95°
76°
8
94°
74°
9
93°
76°
10
92°
75°
11
88°
74°
12
92°
74°
13
94°
74°
14
94°
75°
15
94°
75°
16
94°
77°
17
91°
73°
18
91°
69°
19
92°
69°
20
93°
73°
21
94°
75°
22
96°
74°
23
96°
73°
24
94°
69°
25
89°
70°
26
90°
72°
27
91°
70°
28
90°
72°
29
89°
73°
30
86°
72°
1
85°
68°
2
88°
65°
3
87°
68°
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 65° and 73°. The average high for September is 89° with an average low of 70°. 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.
