S
M
T
W
T
F
S
27
65°
48°
28
64°
46°
29
63°
53°
30
65°
49°
1
68°
51°
2
73°
52°
3
70°
50°
4
75°
52°
5
68°
49°
6
66°
48°
7
68°
48°
8
68°
47°
9
66°
50°
10
68°
48°
11
68°
50°
12
67°
48°
13
65°
49°
14
61°
45°
15
63°
50°
16
61°
45°
17
59°
40°
18
62°
43°
19
64°
46°
20
64°
49°
21
62°
48°
22
58°
46°
23
56°
47°
24
59°
48°
25
59°
48°
26
60°
42°
27
53°
38°
28
59°
44°
29
58°
46°
30
53°
47°
31
58°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Issaquah Plateau
Issaquah Plateau's October 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 38° and 52°. The average high for October is 63° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Issaquah Plateau. See also: November | December | January.
