S
M
T
W
T
F
S
27
75°
48°
28
72°
43°
29
71°
58°
30
72°
54°
1
80°
49°
2
77°
50°
3
81°
48°
4
82°
48°
5
78°
51°
6
75°
49°
7
77°
47°
8
78°
47°
9
65°
51°
10
60°
41°
11
65°
36°
12
64°
38°
13
67°
38°
14
73°
48°
15
81°
41°
16
78°
43°
17
67°
46°
18
67°
37°
19
66°
49°
20
75°
42°
21
72°
40°
22
65°
38°
23
61°
39°
24
58°
35°
25
53°
47°
26
58°
51°
27
59°
47°
28
56°
45°
29
53°
43°
30
53°
41°
31
54°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Downtown Portland
Downtown Portland's October 2026 forecast shows daily high temperatures ranging from 53° to 59°, with overnight lows between 41° and 51°. The average high for October is 56° 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 October weather will actually feel in Downtown Portland. See also: November | December | January.
