S
M
T
W
T
F
S
26
73°
60°
27
80°
62°
28
81°
59°
29
80°
58°
30
77°
55°
31
74°
56°
1
72°
55°
2
73°
56°
3
73°
54°
4
74°
55°
5
76°
56°
6
74°
63°
7
73°
63°
8
75°
59°
9
73°
60°
10
78°
61°
11
77°
59°
12
74°
61°
13
79°
54°
14
71°
55°
15
74°
62°
16
75°
55°
17
76°
53°
18
72°
56°
19
71°
55°
20
73°
55°
21
72°
54°
22
71°
60°
23
75°
55°
24
74°
52°
25
70°
54°
26
68°
54°
27
69°
55°
28
67°
54°
29
68°
53°
30
72°
52°
31
69°
52°
1
69°
54°
2
70°
52°
3
68°
51°
4
67°
58°
5
69°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Duluth
Duluth's August 2026 forecast shows daily high temperatures ranging from 67° to 81°, with overnight lows between 51° and 63°. The average high for August is 73° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Duluth. See also: September | October | November.
