S
M
T
W
T
F
S
29
44°
32°
30
49°
31°
31
54°
37°
1
49°
41°
2
58°
42°
3
54°
43°
4
59°
41°
5
62°
44°
6
62°
40°
7
55°
35°
8
58°
36°
9
61°
36°
10
60°
39°
11
51°
43°
12
55°
45°
13
57°
45°
14
49°
39°
15
49°
36°
16
55°
40°
17
57°
41°
18
60°
48°
19
62°
47°
20
66°
47°
21
62°
46°
22
57°
44°
23
56°
43°
24
62°
45°
25
61°
46°
26
63°
46°
27
62°
45°
28
60°
44°
29
54°
38°
30
55°
39°
1
54°
39°
2
55°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Friday Harbor
Friday Harbor's April 2026 forecast shows daily high temperatures ranging from 49° to 66°, with overnight lows between 36° and 48°. The average high for April is 58° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Friday Harbor. See also: May | June | July.
