S
M
T
W
T
F
S
26
65°
44°
27
66°
51°
28
62°
49°
29
58°
38°
30
59°
35°
1
50°
34°
2
56°
30°
3
67°
42°
4
79°
45°
5
56°
44°
6
57°
37°
7
60°
33°
8
66°
49°
9
73°
46°
10
64°
43°
11
64°
40°
12
66°
46°
13
59°
41°
14
66°
49°
15
69°
53°
16
74°
55°
17
76°
56°
18
78°
59°
19
80°
59°
20
76°
60°
21
73°
52°
22
65°
47°
23
67°
50°
24
68°
50°
25
68°
51°
26
69°
49°
27
70°
49°
28
71°
51°
29
73°
56°
30
79°
57°
31
79°
59°
1
78°
56°
2
73°
58°
3
80°
61°
4
81°
62°
5
81°
61°
6
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lemont
Lemont's May 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 40° and 62°. The average high for May is 72° with an average low of 53°. 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 Lemont. See also: June | July | August.
