S
M
T
W
T
F
S
26
71°
38°
27
58°
41°
28
61°
49°
29
72°
39°
30
81°
43°
1
74°
50°
2
74°
51°
3
91°
49°
4
76°
55°
5
65°
54°
6
68°
55°
7
71°
51°
8
69°
50°
9
79°
46°
10
70°
54°
11
80°
51°
12
84°
51°
13
64°
54°
14
64°
51°
15
57°
42°
16
58°
45°
17
65°
38°
18
70°
46°
19
66°
48°
20
73°
51°
21
83°
52°
22
77°
51°
23
73°
46°
24
70°
45°
25
65°
41°
26
67°
46°
27
69°
44°
28
66°
45°
29
67°
45°
30
68°
47°
31
69°
46°
1
72°
49°
2
75°
51°
3
74°
49°
4
72°
47°
5
67°
44°
6
73°
49°
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 65° to 83°, with overnight lows between 41° and 52°. The average high for May is 71° with an average low of 47°. 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.
