S
M
T
W
T
F
S
26
55°
41°
27
52°
41°
28
53°
42°
29
50°
42°
30
50°
41°
1
51°
43°
2
52°
43°
3
51°
42°
4
50°
40°
5
52°
40°
6
56°
43°
7
57°
44°
8
56°
44°
9
52°
42°
10
53°
42°
11
53°
43°
12
56°
44°
13
59°
44°
14
57°
45°
15
55°
44°
16
54°
45°
17
54°
46°
18
55°
46°
19
54°
47°
20
55°
47°
21
59°
46°
22
57°
45°
23
56°
43°
24
57°
42°
25
56°
46°
26
57°
43°
27
55°
44°
28
56°
44°
29
56°
45°
30
57°
50°
31
63°
48°
1
63°
45°
2
57°
45°
3
57°
46°
4
59°
45°
5
58°
48°
6
59°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ketchikan
Ketchikan's May 2026 forecast shows daily high temperatures ranging from 50° to 63°, with overnight lows between 40° and 50°. The average high for May is 55° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Ketchikan. See also: June | July | August.
