S
M
T
W
T
F
S
30
85°
66°
31
85°
65°
1
88°
67°
2
88°
67°
3
87°
66°
4
86°
66°
5
83°
65°
6
81°
63°
7
82°
65°
8
82°
65°
9
86°
62°
10
84°
65°
11
86°
65°
12
85°
64°
13
83°
65°
14
84°
64°
15
85°
64°
16
86°
64°
17
Hist. Avg.
83°
58°
18
Hist. Avg.
83°
57°
19
Hist. Avg.
83°
57°
20
Hist. Avg.
82°
57°
21
Hist. Avg.
82°
56°
22
Hist. Avg.
82°
56°
23
Hist. Avg.
81°
55°
24
Hist. Avg.
81°
55°
25
Hist. Avg.
80°
54°
26
Hist. Avg.
80°
54°
27
Hist. Avg.
80°
54°
28
Hist. Avg.
79°
53°
29
Hist. Avg.
79°
53°
30
Hist. Avg.
78°
52°
1
Hist. Avg.
78°
52°
2
Hist. Avg.
78°
52°
3
Hist. Avg.
77°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lafayette
Lafayette's September 2026 forecast shows daily high temperatures ranging from 81° to 88°, with overnight lows between 62° and 67°. The average high for September is 85° with an average low of 65°. 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.
