S
M
T
W
T
F
S
30
82°
66°
31
85°
70°
1
90°
72°
2
94°
73°
3
91°
68°
4
86°
67°
5
82°
60°
6
80°
59°
7
81°
61°
8
78°
56°
9
79°
58°
10
81°
56°
11
77°
55°
12
77°
53°
13
75°
55°
14
77°
54°
15
80°
59°
16
80°
59°
17
79°
58°
18
77°
58°
19
79°
59°
20
80°
60°
21
80°
59°
22
79°
59°
23
80°
58°
24
80°
58°
25
79°
57°
26
79°
56°
27
78°
57°
28
78°
57°
29
77°
55°
30
76°
54°
1
75°
54°
2
75°
55°
3
76°
55°
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 75° to 94°, with overnight lows between 53° and 73°. The average high for September is 80° with an average low of 59°. 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.
