Average temperatures for August at cities, towns, parks and lakes throughout Oregon are listed below in degrees Fahrenheit and Celsius.
You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon.
The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.
Oregon Coast
Average August temperatures
High °F |
Low °F |
Place |
High °C |
Low °C |
69 |
54 |
Astoria |
20 |
12 |
66 |
54 |
Brookings |
19 |
12 |
69 |
53 |
Gold Beach |
20 |
12 |
67 |
51 |
Honeyman State Park |
20 |
11 |
64 |
52 |
Newport |
18 |
11 |
67 |
54 |
North Bend |
20 |
12 |
68 |
54 |
Port Orford |
20 |
12 |
66 |
54 |
Seaside |
19 |
12 |
69 |
50 |
Tillamook |
21 |
10 |
Willamette Valley
Average daily temperatures in August
High °F |
Low °F |
Place |
High °C |
Low °C |
84 |
51 |
Corvallis |
29 |
11 |
84 |
52 |
Eugene |
29 |
11 |
86 |
56 |
Lebanon |
30 |
13 |
82 |
57 |
Portland |
28 |
14 |
84 |
55 |
Salem |
29 |
13 |
Cascade Mountains
August temperatures: daily averages
High °F |
Low °F |
Place |
High °C |
Low °C |
69 |
42 |
Crater Lake Park |
21 |
5 |
81 |
56 |
Detroit Lake Dam |
27 |
13 |
70 |
48 |
Government Camp |
21 |
9 |
91 |
55 |
Grants Pass |
33 |
13 |
79 |
46 |
Howard Prairie Lake Dam |
26 |
8 |
85 |
47 |
Klamath Falls |
29 |
8 |
85 |
49 |
Lakeview |
29 |
9 |
86 |
49 |
McKenzie Bridge |
30 |
10 |
91 |
58 |
Medford |
33 |
14 |
89 |
56 |
Roseburg |
31 |
13 |
79 |
52 |
Three Lynx |
26 |
11 |
85 |
51 |
Toketee Falls |
29 |
10 |
82 |
46 |
Wickiup Reservoir Dam |
28 |
8 |
Central Oregon
Average August temperatures
High °F |
Low °F |
Place |
High °C |
Low °C |
83 |
48 |
Bend |
29 |
9 |
82 |
55 |
Hood River |
28 |
13 |
85 |
44 |
Madras |
30 |
7 |
89 |
57 |
The Dalles |
31 |
14 |
Eastern Oregon
Average August temperatures
High °F |
Low °F |
Place |
High °C |
Low °C |
83 |
46 |
Hart Mountain Antelope Refuge |
28 |
8 |
86 |
55 |
Heppner |
30 |
13 |
87 |
53 |
La Grande |
31 |
12 |
93 |
53 |
Lake Owyhee Dam |
34 |
12 |
83 |
48 |
Malheur National Wildlife Refuge |
28 |
9 |
91 |
57 |
Ontario |
33 |
14 |
90 |
54 |
Pendleton |
32 |
12 |
82 |
35 |
Seneca |
28 |
2 |
89 |
47 |
Summer Lake |
32 |
8 |