S
M
T
W
T
F
S
26
87°
73°
27
89°
76°
28
92°
76°
29
85°
64°
30
74°
63°
1
66°
54°
2
75°
50°
3
80°
51°
4
83°
58°
5
88°
75°
6
86°
64°
7
69°
64°
8
76°
69°
9
81°
68°
10
90°
67°
11
83°
63°
12
85°
65°
13
86°
71°
14
84°
74°
15
90°
75°
16
89°
76°
17
90°
74°
18
87°
66°
19
83°
68°
20
84°
70°
21
88°
67°
22
84°
64°
23
82°
64°
24
84°
67°
25
84°
65°
26
83°
64°
27
83°
65°
28
84°
67°
29
82°
70°
30
84°
70°
31
83°
72°
1
86°
71°
2
87°
70°
3
87°
73°
4
88°
74°
5
87°
72°
6
86°
72°
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 69° to 90°, with overnight lows between 63° and 76°. The average high for May is 85° with an average low of 69°. 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.