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°
44°
9
74°
47°
10
64°
42°
11
59°
42°
12
75°
40°
13
64°
40°
14
68°
51°
15
77°
60°
16
78°
63°
17
84°
67°
18
81°
63°
19
72°
52°
20
63°
47°
21
67°
49°
22
68°
52°
23
71°
51°
24
73°
54°
25
76°
58°
26
74°
53°
27
71°
59°
28
77°
58°
29
74°
58°
30
70°
55°
31
70°
52°
1
71°
50°
2
69°
50°
3
70°
52°
4
73°
61°
5
81°
62°
6
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Joliet
Joliet's May 2026 forecast shows daily high temperatures ranging from 63° to 84°, with overnight lows between 40° and 67°. The average high for May is 73° with an average low of 55°. 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 Joliet. See also: June | July | August.
