S
M
T
W
T
F
S
26
47°
32°
27
47°
37°
28
49°
37°
29
53°
36°
30
56°
38°
1
52°
42°
2
56°
41°
3
58°
40°
4
56°
43°
5
57°
44°
6
53°
44°
7
54°
43°
8
58°
44°
9
59°
40°
10
49°
37°
11
49°
35°
12
50°
39°
13
55°
41°
14
58°
45°
15
53°
40°
16
57°
46°
17
55°
40°
18
51°
38°
19
52°
44°
20
56°
40°
21
53°
47°
22
60°
41°
23
53°
40°
24
53°
38°
25
57°
48°
26
63°
47°
27
54°
46°
28
57°
45°
29
56°
39°
30
59°
47°
31
65°
49°
1
66°
50°
2
70°
52°
3
69°
51°
4
69°
51°
5
68°
50°
6
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Duluth
Duluth's May 2026 forecast shows daily high temperatures ranging from 47° to 70°, with overnight lows between 32° and 52°. The average high for May is 57° with an average low of 43°. 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 Duluth. See also: June | July | August.
