S
M
T
W
T
F
S
29
49°
36°
30
51°
33°
31
59°
36°
1
50°
43°
2
55°
43°
3
61°
45°
4
63°
38°
5
68°
47°
6
75°
45°
7
56°
43°
8
62°
36°
9
66°
38°
10
64°
44°
11
56°
48°
12
59°
47°
13
58°
47°
14
49°
45°
15
49°
37°
16
58°
37°
17
57°
42°
18
70°
42°
19
76°
45°
20
76°
54°
21
63°
52°
22
59°
46°
23
63°
45°
24
68°
41°
25
67°
41°
26
67°
44°
27
68°
45°
28
68°
45°
29
69°
46°
30
66°
47°
1
63°
47°
2
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Issaquah Plateau
Issaquah Plateau's April 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 41° and 48°. The average high for April is 66° with an average low of 45°. 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 Issaquah Plateau. See also: May | June | July.
