Average Temperatures for Oregon in December

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Average temperatures for December 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 December temperatures
High °F Low °F Place High °C Low °C
49 37 Astoria   9    3
55 42 Brookings 13    5
54 41 Gold Beach 12    5
47 38 Honeyman State Park   9    3
51 40 Newport 11    4
51 40 North Bend 11    4
53 40 Port Orford 12    4
49 37 Seaside   9    3
51 36 Tillamook 11    2

Willamette Valley

Average daily temperatures in December
High °F Low °F Place High °C Low °C
46 33 Corvallis   8    1
46 34 Eugene   8    1
45 35 Portland   7    2
46 34 Salem   8    1

Cascade Mountains

December temperatures: daily averages
High °F Low °F Place High °C Low °C
34 18 Crater Lake Park   1   -8
44 34 Detroit Lake Dam   6    1
35 25 Government Camp   2   -4
36 23 Howard Prairie Lake Dam   2   -5
42 22 Klamath Falls   5   -6
38 20 Lakeview   3   -7
41 31 McKenzie Bridge   5    0
46 33 Medford   8    0
41 31 Three Lynx   5    0
40 31 Toketee Falls   5   -1
38 20 Wickiup Reservoir Dam   3   -7

Central Oregon

Average December temperatures
High °F Low °F Place High °C Low °C
39 23 Bend   4   -5
40 30 Hood River   5   -1
40 22 Madras   4   -6
42 29 The Dalles   6   -2

Eastern Oregon

Average December temperatures
High °F Low °F Place High °C Low °C
40 18 Hart Mountain Antelope Refuge   4   -8
41 26 Heppner   5   -4
38 24 La Grande   3   -5
39 20 Lake Owyhee Dam   4   -7
36 18 Malheur Wildlife Refuge   2   -8
36 20 Ontario   2   -7
40 27 Pendleton   4   -3
35 11 Seneca   1 -12
42 24 Summer Lake   6   -4
41 20 Whitehorse Ranch   5   -7
Reference

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

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