S
M
T
W
T
F
S
26
70°
50°
27
72°
54°
28
72°
59°
29
64°
52°
30
59°
39°
1
55°
45°
2
55°
37°
3
63°
32°
4
75°
52°
5
63°
48°
6
59°
45°
7
59°
37°
8
66°
41°
9
73°
39°
10
64°
55°
11
72°
39°
12
75°
45°
13
68°
55°
14
64°
37°
15
68°
41°
16
73°
63°
17
82°
61°
18
82°
64°
19
84°
64°
20
66°
57°
21
66°
54°
22
63°
57°
23
68°
59°
24
73°
59°
25
79°
59°
26
75°
59°
27
80°
61°
28
83°
53°
29
77°
55°
30
81°
52°
31
77°
53°
1
76°
53°
2
78°
55°
3
76°
60°
4
78°
59°
5
76°
59°
6
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rockford
Rockford's May 2026 forecast shows daily high temperatures ranging from 76° to 83°, with overnight lows between 52° and 61°. The average high for May is 78° with an average low of 56°. 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 Rockford. See also: June | July | August.
