Average Precipitation for Washington in October





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

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: 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
17 Aberdeen 7.7 195
18 Clearwater 10.7 273
18 Forks 11.8 300
Friday Harbor, San Juan Island 2.7 69
18 Grayland 7.6 192
19 Long Beach 7.2 183
14 Port Angeles 2.7 68

San Juan Islands, Puget Sound & South

October averages for total precipitation
Days Place Inches Milli­metres
14 Anacortes 2.8 70
15 Bellingham 3.7 93
15 Bremerton 4.9 124
16 Everett 3.6 91
16 Longview 4.0 102
11 Olga, Orcas Island 3.0 75
14 Olympia 4.6 117
12 Port Townsend 1.6 41
13 Seattle 3.4 86
13 Tacoma 3.7 94
14 Vancouver 3.4 86

Cascade Mountains

Average amount of rain and snow in October
Days Place Inches Milli­metres
17 Baker Lake Dam 10.1 257
16 Baring 11.0 279
Darrington 7.7 196
Mt Adams Ranger Station 3.9 99
15 Mt Rainier Paradise Ranger Station 10.4 265
15 Mud Mountain Lake Dam 5.0 128
15 Ross Dam 6.1 155
15 Stampede Pass 7.8 199

Eastern Washington State

Precipitation totals for October
Days Place Inches Milli­metres
11 Boundary Dam 2.1 53
5 Chelan 0.8 20
7 Coulee Dam 0.7 17
5 Kennewick 0.6 15
8 Leavenworth 2.1 53
8 Pullman 1.6 40
8 Spokane 1.2 30
8 Walla Walla 1.7 43
5 Wenatchee 0.6 14
7 Winthrop 1.1 27
5 Yakima 0.5 14
Reference

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

Washington Precipitation
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