S
M
T
W
T
F
S
30
97°
70°
31
97°
72°
1
96°
74°
2
97°
74°
3
96°
73°
4
98°
73°
5
97°
71°
6
96°
72°
7
95°
73°
8
94°
72°
9
95°
73°
10
95°
73°
11
94°
72°
12
95°
72°
13
94°
71°
14
93°
71°
15
92°
70°
16
89°
70°
17
89°
69°
18
91°
70°
19
90°
64°
20
86°
64°
21
86°
68°
22
89°
69°
23
91°
69°
24
87°
68°
25
91°
69°
26
90°
68°
27
90°
67°
28
91°
68°
29
90°
67°
30
88°
67°
1
85°
67°
2
Hist. Avg.
86°
62°
3
Hist. Avg.
86°
62°
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 85° to 98°, with overnight lows between 64° and 74°. The average high for September is 92° with an average low of 70°. 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.
