S
M
T
W
T
F
S
26
70°
44°
27
71°
50°
28
61°
46°
29
55°
41°
30
54°
39°
1
53°
34°
2
59°
31°
3
73°
45°
4
79°
42°
5
58°
40°
6
51°
32°
7
63°
38°
8
71°
49°
9
73°
41°
10
63°
39°
11
66°
44°
12
58°
46°
13
62°
48°
14
68°
52°
15
71°
51°
16
72°
55°
17
74°
59°
18
74°
56°
19
75°
56°
20
73°
51°
21
67°
47°
22
65°
47°
23
66°
49°
24
68°
51°
25
68°
53°
26
69°
51°
27
71°
52°
28
72°
51°
29
74°
54°
30
77°
56°
31
78°
59°
1
77°
55°
2
77°
59°
3
80°
61°
4
81°
62°
5
80°
62°
6
74°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dubuque
Dubuque's May 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 38° and 62°. The average high for May is 71° with an average low of 52°. 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 Dubuque. See also: June | July | August.
