S
M
T
W
T
F
S
26
61°
52°
27
62°
53°
28
62°
53°
29
63°
54°
30
63°
52°
31
64°
54°
1
64°
55°
2
63°
56°
3
63°
54°
4
64°
53°
5
63°
52°
6
65°
55°
7
64°
56°
8
63°
56°
9
66°
55°
10
66°
54°
11
65°
57°
12
63°
57°
13
63°
56°
14
66°
56°
15
63°
55°
16
63°
56°
17
63°
53°
18
62°
53°
19
62°
55°
20
63°
51°
21
62°
50°
22
64°
51°
23
66°
52°
24
66°
53°
25
65°
51°
26
60°
50°
27
61°
53°
28
65°
53°
29
65°
51°
30
64°
54°
31
61°
54°
1
62°
53°
2
64°
53°
3
61°
52°
4
64°
52°
5
64°
48°
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 60° to 66°, with overnight lows between 48° and 57°. 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.
