S
M
T
W
T
F
S
26
91°
64°
27
71°
56°
28
72°
57°
29
78°
61°
30
90°
71°
31
78°
63°
1
75°
57°
2
70°
55°
3
76°
61°
4
77°
51°
5
75°
56°
6
77°
57°
7
78°
59°
8
77°
60°
9
72°
56°
10
75°
59°
11
73°
58°
12
74°
60°
13
76°
59°
14
71°
58°
15
71°
63°
16
78°
63°
17
74°
62°
18
74°
62°
19
78°
63°
20
79°
62°
21
72°
58°
22
69°
54°
23
68°
54°
24
69°
55°
25
68°
53°
26
72°
60°
27
77°
61°
28
77°
61°
29
76°
62°
30
77°
61°
31
76°
61°
1
76°
58°
2
67°
52°
3
66°
59°
4
76°
61°
5
76°
61°
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 66° to 79°, with overnight lows between 51° and 63°. The average high for August is 74° with an average low of 59°. 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.
