Average Precipitation for Washington in January





The tables below give monthly averages for rainfall plus snowfall during January at cities and other locations in Washington.

Each place has a total for the amount of precipitation it usually receives this month. There is also 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 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Olympic Peninsula & West Coast, San Juan Islands & Puget Sound, Cascade Mountains and Eastern Washington.

Olympic Peninsula & West Coast

Average monthly precipitation in January
Days Place Inches Milli­metres
22 Aberdeen 13.9 354
23 Clearwater 17.7 448
23 Forks 19.1 485
17 Friday Harbor, San Juan Island 2.7 68
23 Grayland 11.5 291
23 Long Beach 12.0 306
19 Port Angeles 3.8 97

San Juan Islands, Puget Sound & South

January averages for total precipitation
Days Place Inches Milli­metres
18 Anacortes 3.9 100
19 Bellingham 4.5 114
19 Bremerton 9.3 236
22 Centralia 5.9 149
19 Everett 3.9 99
24 Longview 6.5 166
16 Oak Harbor, Whidbey Island 2.4 62
15 Olga, Orcas Island 4.0 100
20 Olympia 7.8 198
16 Port Townsend 2.2 57
19 Seattle 5.8 147
20 Shelton 11.1 281
20 Tacoma 6.0 153
20 Vancouver 6.1 154

Cascade Mountains

Average amount of rain and snow in January
Days Place Inches Milli­metres
21 Baker Lake Dam 15.3 389
20 Baring 16.7 425
19 Ross Dam 9.7 247

Eastern Washington State

Precipitation totals for January
Days Place Inches Milli­metres
15 Boundary Dam 3.1 79
9 Chelan 1.5 39
11 Coulee Dam 1.2 29
11 Kennewick 1.1 29
14 Leavenworth 4.1 105
10 Moses Lake 1.0 26
14 Pullman 2.7 68
14 Spokane 2.0 50
13 Walla Walla 2.1 53
10 Wenatchee 1.3 34
12 Winthrop 2.1 52
10 Yakima 1.2 30
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Washington Precipitation
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