Average Precipitation for Washington in October





The tables below give monthly averages for rainfall plus snowfall during October 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 October
Days Place Inches Milli­metres
18 Aberdeen 8.3 210
18 Clearwater 10.5 267
19 Forks 11.7 297
15 Friday Harbor, San Juan Island 2.3 59
19 Grayland 8.0 202
20 Long Beach 8.2 208
15 Port Angeles 3.2 80

San Juan Islands, Puget Sound & South

October averages for total precipitation
Days Place Inches Milli­metres
14 Anacortes 2.8 71
16 Bellingham 3.9 98
16 Bremerton 5.1 131
16 Centralia 4.0 102
18 Everett 3.4 85
17 Longview 4.4 111
15 Oak Harbor, Whidbey Island 2.0 52
12 Olga, Orcas Island 3.2 82
15 Olympia 5.1 129
13 Port Townsend 1.6 42
14 Seattle 3.9 99
15 Shelton 7.0 178
15 Tacoma 4.1 104
14 Vancouver 3.6 92

Cascade Mountains

Average amount of rain and snow in October
Days Place Inches Milli­metres
17 Baker Lake Dam 10.5 267
17 Baring 12.3 312
16 Ross Dam 6.7 171

Eastern Washington State

Precipitation totals for October
Days Place Inches Milli­metres
12 Boundary Dam 2.4 61
6 Chelan 1.0 26
7 Coulee Dam 0.9 24
6 Kennewick 0.7 17
9 Leavenworth 2.4 60
7 Moses Lake 0.7 17
9 Pullman 1.8 46
9 Spokane 1.4 35
9 Walla Walla 1.7 42
6 Wenatchee 0.7 18
9 Winthrop 1.4 35
6 Yakima 0.6 16
Reference

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

Washington Precipitation
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