S
M
T
W
T
F
S
26
54°
35°
27
55°
38°
28
57°
40°
29
56°
39°
30
60°
40°
1
59°
41°
2
56°
39°
3
56°
38°
4
57°
38°
5
58°
41°
6
59°
47°
7
70°
45°
8
60°
41°
9
60°
44°
10
61°
39°
11
59°
38°
12
59°
38°
13
60°
39°
14
62°
44°
15
62°
43°
16
63°
50°
17
66°
43°
18
64°
41°
19
62°
43°
20
64°
47°
21
67°
53°
22
72°
54°
23
73°
53°
24
73°
50°
25
66°
52°
26
75°
57°
27
77°
49°
28
66°
47°
29
77°
54°
30
77°
51°
31
75°
51°
1
78°
52°
2
80°
54°
3
79°
58°
4
80°
58°
5
80°
57°
6
73°
58°
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 54° to 80°, with overnight lows between 35° and 58°. The average high for May is 66° with an average low of 46°. 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.
