Average Temperatures for Oregon in September

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Average temperatures for September at cities, towns, parks and lakes throughout Oregon are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1981 to 2010.

You can jump to a separate table for each region of the state: Oregon Coast, Willamette Valley, Cascade Mountains, Central Oregon and Eastern Oregon.

Oregon Coast

Average September temperatures
High °F Low °F Place High °C Low °C
68 49 Astoria 20 10
68 51 Brookings 20 11
68 51 Gold Beach 20 11
66 49 Honeyman State Park 19   9
65 49 Newport 18 10
65 50 North Bend 18 10
67 51 Port Orford 19 10
65 49 Seaside 18   9
69 46 Tillamook 21   8

Willamette Valley

Average daily temperatures in September
High °F Low °F Place High °C Low °C
77 48 Corvallis 25   9
77 47 Eugene 25   8
75 52 Portland 24 11
77 48 Salem 25   9

Cascade Mountains

September temperatures: daily averages
High °F Low °F Place High °C Low °C
63 36 Crater Lake Park 17   2
74 50 Detroit Lake Dam 24 10
63 43 Government Camp 17   6
74 39 Howard Prairie Lake Dam 23   4
81 44 Klamath Falls 27   7
76 41 Lakeview 24   5
77 45 McKenzie Bridge 25   7
84 50 Medford 29 10
73 46 Three Lynx 23   8
75 45 Toketee Falls 24   7
74 37 Wickiup Reservoir Dam 24   3

Central Oregon

Average September temperatures
High °F Low °F Place High °C Low °C
74 40 Bend 23   4
76 46 Hood River 25   8
76 39 Madras 25   4
81 49 The Dalles 27   9

Eastern Oregon

Average September temperatures
High °F Low °F Place High °C Low °C
73 37 Hart Mountain Antelope Refuge 23   3
77 47 Heppner 25   8
76 44 La Grande 25   7
81 44 Lake Owyhee Dam 27   7
74 40 Malheur Wildlife Refuge 24   4
81 45 Ontario 27   7
77 49 Pendleton 25 10
72 28 Seneca 22  -2
79 43 Summer Lake 26   6
78 44 Whitehorse Ranch 25   7
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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