S
M
T
W
T
F
S
26
42°
36°
27
46°
36°
28
57°
41°
29
46°
33°
30
43°
33°
1
46°
31°
2
59°
40°
3
60°
40°
4
51°
34°
5
47°
37°
6
46°
34°
7
45°
33°
8
48°
34°
9
50°
35°
10
51°
37°
11
51°
40°
12
56°
41°
13
50°
38°
14
51°
36°
15
51°
40°
16
52°
40°
17
51°
45°
18
54°
44°
19
62°
46°
20
62°
45°
21
54°
40°
22
52°
39°
23
50°
37°
24
52°
40°
25
56°
42°
26
55°
44°
27
54°
44°
28
53°
42°
29
56°
46°
30
58°
40°
31
56°
44°
1
56°
44°
2
55°
42°
3
56°
45°
4
57°
45°
5
57°
42°
6
58°
44°
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 43° to 62°, with overnight lows between 31° and 46°. The average high for May is 53° with an average low of 40°. 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.
