S
M
T
W
T
F
S
27
78°
54°
28
79°
49°
29
71°
44°
30
70°
45°
1
71°
46°
2
78°
47°
3
78°
50°
4
77°
50°
5
79°
51°
6
78°
51°
7
77°
50°
8
79°
42°
9
75°
47°
10
73°
41°
11
65°
48°
12
67°
49°
13
66°
49°
14
74°
48°
15
76°
49°
16
75°
44°
17
74°
36°
18
69°
35°
19
62°
35°
20
62°
36°
21
60°
44°
22
63°
43°
23
70°
37°
24
65°
34°
25
58°
32°
26
57°
40°
27
60°
41°
28
67°
32°
29
65°
30°
30
57°
31°
31
68°
34°
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 57° to 79°, with overnight lows between 30° and 54°. The average high for October is 70° 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 October weather will actually feel in Portland. See also: November | December | January.
