Average Precipitation for Washington in April





The tables below give monthly averages for rainfall plus snowfall during April 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 April
Days Place Inches Milli­metres
19 Aberdeen 6.3 160
18 Clearwater 8.7 220
20 Forks 9.4 240
10 Friday Harbor, San Juan Island 1.0 26
20 Grayland 6.0 152
21 Long Beach 6.8 172
12 Port Angeles 1.6 40

San Juan Islands, Puget Sound & South

April averages for total precipitation
Days Place Inches Milli­metres
13 Anacortes 2.1 52
16 Bellingham 2.8 70
16 Bremerton 3.9 98
17 Centralia 3.2 82
16 Everett 2.7 68
19 Longview 4.1 104
13 Oak Harbor, Whidbey Island 1.7 43
11 Olga, Orcas Island 2.1 53
16 Olympia 3.7 93
13 Port Townsend 1.5 39
15 Seattle 3.2 81
16 Shelton 4.9 123
15 Tacoma 3.4 86
17 Vancouver 3.6 91

Cascade Mountains

Average amount of rain and snow in April
Days Place Inches Milli­metres
18 Baker Lake Dam 6.7 170
18 Baring 8.4 212
15 Ross Dam 3.2 82

Eastern Washington State

Precipitation totals for April
Days Place Inches Milli­metres
13 Boundary Dam 2.2 56
5 Chelan 0.8 19
9 Coulee Dam 1.0 25
7 Kennewick 0.6 15
7 Leavenworth 1.2 31
6 Moses Lake 0.7 17
11 Pullman 2.0 50
10 Spokane 1.3 32
11 Walla Walla 2.0 50
5 Wenatchee 0.6 15
7 Winthrop 0.8 21
6 Yakima 0.6 14
Reference

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

Washington Precipitation
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