S
M
T
W
T
F
S
26
74°
49°
27
80°
49°
28
75°
57°
29
71°
62°
30
78°
63°
31
80°
64°
1
82°
61°
2
81°
65°
3
74°
64°
4
86°
61°
5
83°
58°
6
87°
67°
7
90°
71°
8
80°
69°
9
92°
66°
10
84°
62°
11
86°
62°
12
83°
59°
13
80°
55°
14
80°
57°
15
76°
54°
16
72°
54°
17
70°
65°
18
78°
62°
19
77°
62°
20
84°
60°
21
79°
65°
22
71°
64°
23
70°
63°
24
77°
63°
25
78°
57°
26
81°
59°
27
78°
61°
28
80°
66°
29
77°
56°
30
79°
56°
31
76°
53°
1
72°
53°
2
66°
60°
3
66°
61°
4
80°
63°
5
75°
58°
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.
