S
M
T
W
T
F
S
26
57°
44°
27
60°
47°
28
56°
44°
29
54°
45°
30
53°
41°
31
55°
37°
1
55°
34°
2
59°
39°
3
56°
44°
4
55°
44°
5
57°
40°
6
55°
39°
7
59°
41°
8
56°
50°
9
56°
50°
10
58°
50°
11
58°
47°
12
58°
46°
13
58°
48°
14
60°
48°
15
56°
42°
16
59°
43°
17
65°
42°
18
58°
45°
19
62°
53°
20
55°
48°
21
59°
47°
22
57°
50°
23
59°
48°
24
59°
49°
25
58°
44°
26
60°
40°
27
61°
41°
28
62°
45°
29
59°
37°
30
64°
40°
31
67°
42°
1
63°
46°
2
57°
45°
3
58°
47°
4
61°
49°
5
60°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Portland
Portland's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Portland. See also: September | October | November.
