S
M
T
W
T
F
S
27
57°
47°
28
56°
40°
29
54°
37°
30
58°
41°
31
58°
35°
1
54°
35°
2
57°
33°
3
57°
36°
4
62°
51°
5
59°
46°
6
55°
40°
7
54°
44°
8
59°
41°
9
63°
38°
10
65°
48°
11
64°
48°
12
59°
45°
13
59°
38°
14
62°
37°
15
57°
45°
16
53°
36°
17
55°
41°
18
55°
36°
19
55°
37°
20
63°
37°
21
65°
46°
22
65°
50°
23
60°
41°
24
62°
36°
25
62°
48°
26
63°
50°
27
54°
47°
28
57°
45°
29
49°
45°
30
56°
43°
31
58°
47°
1
59°
44°
2
58°
43°
3
58°
47°
4
54°
37°
5
58°
33°
6
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Portland
Portland's August 2025 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.
