S
M
T
W
T
F
S
30
89°
70°
31
91°
68°
1
93°
68°
2
95°
70°
3
97°
72°
4
95°
70°
5
93°
70°
6
95°
72°
7
88°
70°
8
91°
68°
9
91°
69°
10
89°
69°
11
89°
71°
12
88°
70°
13
88°
69°
14
91°
68°
15
90°
67°
16
89°
66°
17
87°
66°
18
85°
65°
19
84°
64°
20
83°
63°
21
81°
61°
22
87°
65°
23
86°
65°
24
86°
64°
25
85°
65°
26
86°
65°
27
86°
64°
28
85°
65°
29
84°
65°
30
84°
64°
1
84°
64°
2
83°
61°
3
76°
58°
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 76° to 91°, with overnight lows between 58° and 71°. The average high for September is 86° 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 LaGrange. See also: October | November | December.