S
M
T
W
T
F
S
30
76°
53°
31
75°
52°
1
76°
53°
2
74°
51°
3
74°
51°
4
77°
55°
5
77°
55°
6
73°
56°
7
74°
52°
8
78°
50°
9
73°
56°
10
77°
58°
11
79°
56°
12
79°
56°
13
75°
48°
14
72°
51°
15
70°
47°
16
70°
47°
17
67°
54°
18
72°
50°
19
71°
53°
20
70°
45°
21
74°
44°
22
66°
42°
23
74°
52°
24
76°
44°
25
72°
43°
26
Hist. Avg.
69°
46°
27
Hist. Avg.
69°
45°
28
Hist. Avg.
68°
45°
29
Hist. Avg.
68°
44°
30
Hist. Avg.
67°
44°
1
Hist. Avg.
67°
44°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
66°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in La Grange
La Grange's September 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 42° and 58°. The average high for September is 74° with an average low of 51°. 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.
