S
M
T
W
T
F
S
30
75°
64°
31
85°
70°
1
87°
73°
2
92°
72°
3
88°
70°
4
81°
66°
5
80°
57°
6
79°
56°
7
81°
62°
8
85°
68°
9
86°
66°
10
79°
62°
11
76°
58°
12
77°
58°
13
73°
57°
14
75°
56°
15
74°
55°
16
79°
61°
17
78°
60°
18
74°
59°
19
79°
60°
20
78°
60°
21
78°
59°
22
76°
58°
23
74°
56°
24
71°
57°
25
77°
58°
26
74°
57°
27
68°
51°
28
66°
50°
29
65°
50°
30
65°
47°
1
63°
46°
2
65°
54°
3
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in LaGrange
LaGrange's September 2026 forecast shows daily high temperatures ranging from 63° to 92°, with overnight lows between 46° and 72°. The average high for September is 76° with an average low of 58°. 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 LaGrange. See also: October | November | December.