S
M
T
W
T
F
S
30
81°
69°
31
91°
72°
1
94°
75°
2
96°
75°
3
91°
73°
4
91°
72°
5
88°
71°
6
81°
64°
7
76°
61°
8
77°
62°
9
76°
61°
10
76°
62°
11
75°
56°
12
76°
56°
13
76°
58°
14
75°
55°
15
78°
60°
16
78°
61°
17
77°
60°
18
77°
60°
19
78°
61°
20
78°
61°
21
77°
60°
22
78°
60°
23
78°
59°
24
77°
59°
25
78°
58°
26
78°
59°
27
77°
58°
28
76°
58°
29
75°
57°
30
75°
56°
1
74°
56°
2
75°
55°
3
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Grange
La Grange's September 2026 forecast shows daily high temperatures ranging from 74° to 96°, with overnight lows between 55° and 75°. The average high for September is 79° with an average low of 61°. 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 La Grange. See also: October | November | December.
