S
M
T
W
T
F
S
27
73°
48°
28
74°
50°
29
75°
55°
30
83°
50°
1
87°
59°
2
78°
60°
3
71°
54°
4
76°
51°
5
70°
45°
6
68°
39°
7
80°
40°
8
77°
48°
9
75°
44°
10
64°
49°
11
67°
58°
12
75°
61°
13
84°
58°
14
86°
62°
15
72°
68°
16
75°
47°
17
55°
34°
18
63°
38°
19
66°
38°
20
70°
40°
21
72°
45°
22
71°
48°
23
70°
48°
24
70°
50°
25
69°
48°
26
64°
45°
27
65°
37°
28
56°
31°
29
55°
30°
30
59°
43°
31
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Portland
Portland's October 2026 forecast shows daily high temperatures ranging from 55° to 86°, with overnight lows between 30° and 68°. The average high for October is 66° 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 Portland. See also: November | December | January.
