S
M
T
W
T
F
S
26
93°
69°
27
92°
70°
28
84°
66°
29
88°
70°
30
92°
71°
31
93°
70°
1
88°
70°
2
88°
69°
3
85°
62°
4
85°
67°
5
86°
63°
6
91°
62°
7
88°
61°
8
85°
60°
9
85°
64°
10
86°
66°
11
88°
63°
12
85°
60°
13
83°
60°
14
83°
62°
15
84°
64°
16
83°
59°
17
84°
59°
18
82°
60°
19
83°
59°
20
83°
65°
21
85°
68°
22
90°
67°
23
90°
67°
24
89°
64°
25
89°
63°
26
87°
60°
27
81°
59°
28
82°
58°
29
82°
59°
30
83°
58°
31
81°
56°
1
80°
59°
2
81°
59°
3
85°
62°
4
84°
54°
5
80°
53°
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 80° to 93°, with overnight lows between 53° and 71°. The average high for August is 86° with an average low of 63°. 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.
