S
M
T
W
T
F
S
26
62°
53°
27
66°
53°
28
61°
53°
29
58°
53°
30
59°
53°
31
62°
54°
1
58°
54°
2
64°
54°
3
64°
55°
4
66°
53°
5
64°
57°
6
64°
55°
7
66°
54°
8
66°
52°
9
70°
52°
10
65°
56°
11
68°
56°
12
73°
57°
13
76°
57°
14
78°
58°
15
73°
55°
16
70°
56°
17
68°
55°
18
66°
56°
19
67°
54°
20
65°
55°
21
66°
55°
22
64°
54°
23
65°
53°
24
59°
50°
25
62°
51°
26
64°
52°
27
66°
55°
28
65°
55°
29
61°
52°
30
62°
54°
31
62°
54°
1
60°
53°
2
60°
54°
3
61°
53°
4
64°
54°
5
63°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ketchikan
Ketchikan's August 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 50° and 58°. The average high for August is 66° with an average low of 54°. 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 Ketchikan. See also: September | October | November.
