S
M
T
W
T
F
S
26
55°
39°
27
58°
40°
28
62°
39°
29
57°
40°
30
59°
42°
1
61°
41°
2
56°
42°
3
60°
40°
4
57°
39°
5
60°
47°
6
59°
49°
7
70°
47°
8
65°
46°
9
63°
46°
10
62°
40°
11
59°
40°
12
59°
41°
13
61°
41°
14
62°
47°
15
62°
45°
16
65°
52°
17
71°
45°
18
63°
42°
19
63°
46°
20
64°
50°
21
66°
54°
22
73°
55°
23
71°
49°
24
65°
47°
25
69°
54°
26
76°
55°
27
76°
50°
28
66°
48°
29
76°
52°
30
74°
51°
31
76°
54°
1
77°
55°
2
80°
55°
3
79°
57°
4
79°
58°
5
80°
58°
6
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in La Grange
La Grange's May 2026 forecast shows daily high temperatures ranging from 55° to 80°, with overnight lows between 39° and 58°. The average high for May is 67° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in La Grange. See also: June | July | August.