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°
55°
2
66°
56°
3
69°
53°
4
70°
54°
5
67°
55°
6
70°
54°
7
69°
54°
8
68°
54°
9
69°
53°
10
68°
54°
11
66°
54°
12
64°
55°
13
65°
54°
14
66°
51°
15
62°
55°
16
62°
52°
17
62°
55°
18
62°
54°
19
63°
55°
20
61°
55°
21
61°
53°
22
62°
51°
23
60°
51°
24
61°
54°
25
60°
52°
26
60°
52°
27
59°
51°
28
60°
49°
29
63°
51°
30
65°
52°
31
64°
54°
1
60°
53°
2
59°
52°
3
58°
50°
4
58°
50°
5
59°
50°
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 58° to 70°, with overnight lows between 49° and 56°. The average high for August is 63° with an average low of 53°. 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.
