S
M
T
W
T
F
S
30
87°
70°
31
88°
70°
1
84°
69°
2
84°
72°
3
89°
70°
4
89°
72°
5
88°
72°
6
87°
71°
7
88°
67°
8
84°
66°
9
84°
65°
10
83°
65°
11
85°
66°
12
85°
65°
13
86°
66°
14
87°
68°
15
86°
70°
16
87°
69°
17
86°
63°
18
81°
63°
19
79°
64°
20
79°
68°
21
83°
68°
22
84°
65°
23
83°
67°
24
80°
66°
25
80°
67°
26
82°
66°
27
83°
66°
28
84°
65°
29
81°
65°
30
79°
64°
1
80°
65°
2
82°
62°
3
81°
57°
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 79° to 89°, with overnight lows between 57° and 72°. The average high for September is 84° with an average low of 67°. 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.
