Average Precipitation for Oregon in January

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

Each place has a total for the amount of precipitation it usually receives this month. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

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 January
Days	Place	Inches	Millimetres
22	Astoria	10.6	269
20	Brookings	13.1	332
18	Gold Beach	12.0	304
20	Newport	10.3	262
19	North Bend	9.4	240
20	Port Orford	11.6	295
21	Seaside	11.0	280
22	Tillamook	13.4	340

Willamette Valley

January averages for total rainfall plus snowfall
Days	Place	Inches	Millimetres
21	Corvallis	6.5	164
18	Eugene	6.1	154
20	Portland	6.0	153
18	Salem	6.1	154

Cascade Mountains

Average amount of rain and snow in January
Days	Place	Inches	Millimetres
18	Crater Lake Park	10.1	257
20	Detroit Lake Dam	13.1	332
20	Government Camp	12.6	320
17	Grants Pass	5.1	129
15	Howard Prairie Lake Dam	4.7	119
11	Klamath Falls	1.5	38
11	Lakeview	1.9	48
14	Medford	2.7	69
18	Roseburg	5.3	134
20	Three Lynx	9.3	235
18	Toketee Falls	6.5	166
13	Wickiup Reservoir Dam	3.0	75

Central Oregon

Precipitation totals for January
Days	Place	Inches	Millimetres
9	Bend	1.4	36
19	Hood River	5.2	133
8	Madras	0.9	22
12	The Dalles	2.5	62

Eastern Oregon

Total precipitation during January
Days	Place	Inches	Millimetres
11	Heppner	1.3	34
10	La Grande	1.7	42
9	Lake Owyhee Dam	1.1	27
8	Ontario	1.3	33
12	Pendleton	1.5	39
12	Seneca	1.6	40
13	Summer Lake	1.6	40