S
M
T
W
T
F
S
27
65°
48°
28
64°
46°
29
63°
53°
30
65°
49°
1
68°
51°
2
71°
52°
3
67°
54°
4
69°
51°
5
68°
52°
6
66°
52°
7
67°
53°
8
67°
51°
9
58°
50°
10
58°
45°
11
60°
43°
12
61°
41°
13
62°
46°
14
67°
51°
15
68°
50°
16
77°
46°
17
62°
49°
18
60°
43°
19
62°
46°
20
62°
46°
21
64°
43°
22
60°
46°
23
58°
44°
24
54°
47°
25
53°
46°
26
57°
45°
27
56°
46°
28
55°
44°
29
54°
41°
30
54°
39°
31
58°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Seattle
Seattle's October 2026 forecast shows daily high temperatures ranging from 53° to 58°, with overnight lows between 39° and 47°. The average high for October 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 October weather will actually feel in Seattle. See also: November | December | January.
