S
M
T
W
T
F
S
30
79°
62°
31
81°
61°
1
77°
55°
2
77°
55°
3
76°
54°
4
76°
52°
5
77°
54°
6
77°
59°
7
78°
57°
8
76°
58°
9
75°
55°
10
75°
53°
11
79°
59°
12
80°
59°
13
79°
58°
14
81°
57°
15
80°
57°
16
79°
56°
17
76°
57°
18
80°
58°
19
79°
57°
20
77°
54°
21
79°
48°
22
75°
49°
23
76°
53°
24
70°
54°
25
Hist. Avg.
72°
49°
26
Hist. Avg.
72°
49°
27
Hist. Avg.
71°
48°
28
Hist. Avg.
71°
48°
29
Hist. Avg.
71°
47°
30
Hist. Avg.
70°
47°
1
Hist. Avg.
70°
46°
2
Hist. Avg.
70°
46°
3
Hist. Avg.
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in West Lafayette
West Lafayette's September 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 48° and 62°. The average high for September is 77° with an average low of 56°. 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 West Lafayette. See also: October | November | December.
