Average Precipitation for Oregon in December





The tables below give monthly averages for rainfall plus snowfall during December at cities, towns and parks in Oregon.

Each place has a total for the amount of precipitation it usually receives this month. Most sites also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

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 monthly precipitation in December
Days Place Inches Milli­metres
21 Astoria 9.9 251
18 Brookings 14.5 369
19 Gold Beach 13.8 350
19 Honeyman State Park 11.6 294
20 Newport 10.8 275
North Bend 11.1 283
20 Port Orford 12.6 321
20 Seaside 10.6 268
22 Tillamook 13.2 336

Willamette Valley

December averages for total rainfall plus snowfall
Days Place Inches Milli­metres
21 Corvallis 7.7 196
18 Eugene 7.8 199
20 Portland 6.9 176
18 Salem 6.9 174

Cascade Mountains

Average amount of rain and snow in December
Days Place Inches Milli­metres
18 Crater Lake Park 11.6 294
20 Detroit Lake Dam 14.4 367
20 Government Camp 13.3 338
15 Howard Prairie Lake Dam 5.9 150
12 Klamath Falls 2.6 66
11 Lakeview 2.2 56
McKenzie Bridge 12.3 313
14 Medford 3.5 89
21 Three Lynx 11.1 282
18 Toketee Falls 8.1 207
14 Wickiup Reservoir Dam 3.9 98

Central Oregon

Precipitation totals for December
Days Place Inches Milli­metres
10 Bend 2.2 56
18 Hood River 5.9 150
9 Madras 1.4 35
13 The Dalles 3.1 79

Eastern Oregon

Total precipitation during December
Days Place Inches Milli­metres
Hart Mountain Antelope Refuge 1.4 35
12 Heppner 1.3 34
11 La Grande 1.7 42
10 Lake Owyhee Dam 1.3 32
8 Malheur Wildlife Refuge 1.1 28
10 Ontario 1.7 43
12 Pendleton 1.5 37
13 Seneca 1.8 45
12 Summer Lake 1.9 49
Reference

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

Oregon Precipitation
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