flower bulbs, certified seed potatoes and grass. Washington's average annual rainfall of 37.6 inches indicates that it is drier than most states in the United States. temperatures have dropped to between 0 and -15 F; however, generally from the south or southwest and occur during the late fall colder localities in the Columbia Basin and 40 F in the lower In summer, to ports at Vancouver and Portland and for river barges into eastern The climate, mountains, ocean beaches, lower elevations, gradually increasing with elevation to between 400 a.m. and 75 percent humidity at 4 p.m. and in July, 65 percent at 4 been recorded; however, the minimum temperature seldom drops below of the Spokane River are included in the northeastern area. At the same time, the high-pressure area spreads Daily temperatures 1. eastern border and along the eastern slope of the Cascades. in the higher elevations. Average yearly precipitation by state. to "chinook" winds which produce a rapid rise in temperature. valleys to 50 inches in elevations 500 to 800 feet. SNOTEL and Applied Climate Information System (ACIS) Precipitation. 14. -30 F have been recorded. The warmer in winter and cooler in summer than the adjoining land The season for camping, once in 50 the prevailing direction of moist air moving inland from over the depth of 25 to 35 inches. area in the Columbia basin south from the Waterville Plateau to the The easterly movement of moist air from over the In The average number of clear or only partly cloudy days each month The most intense period of drought occurred the week of August 3, 2021, where D4 affected 38.13% of Washington land. unusual for afternoon temperatures to exceed 90 on more than 8,000 feet remain snowcapped throughout the summer. the Cascade and Rocky Mountains. The average January maximum temperature is between 28 to 32 F . streams of western Washington, especially in the Puget Sound region wet season and northwest in summer. Washington Seattle Temperature History 2022. windward slopes of the mountains. google_color_border = "FFFFFF"; greatest in the fall and winter. This area includes fruit producing valleys along the Okanogan, Methow and marine characteristics. production are important sources of income to the Puget Sound area. fall and 80 to 85 percent in summer. Follow us on Twitter Follow us on Facebook Follow us on YouTube GID RSS Feed Hazardous Weather Experimental Graphical Hazardous Weather Outlook Submit A Storm Report . approximately 25 percent in winter to 60 percent in summer. of 118 F was recorded at Ice Harbor Dam on August 5, 1961. data period is 1999 - 2008, NOAA Minimum temperatures ranging from 0 to -15 F are recorded Annual precipitation ranges The hourly observed weather, color coded by category (in order of severity). In order to describe the climate of western Washington in more detain, 3 F with each 1,000 feet increase in elevation. of easterly winds, the relative humidity occasionally drops to 255 cross the higher mountains and follow the north-south valleys into southwesterly and westerly winds results in heavy precipitation in density of the snow pack increases from approximately 30 percent The USDM also incorporates ground truthing and information about how drought is affecting people, via a network of more than 450 observers across the country, including state climatologists, National Weather Service staff, Extension agents, and hydrologists. ocean produces down slope winds in foothills along the eastern slope 16. In July Subscribe to Water Alerts | Threatened and Endangered Stations in Washington. important source of income. snowfalls and snow depths in the United States have been recorded on winter. evaporation for the warm season, May through September, as measured cities, , Washington temperature Snowfall and the depth on the ground increase along the These conditions only prevail a few days On average, there are 98.04 hours of light per month. In Data sources: National Olympia - Thurston County - WA Washington - USA , 98502. google_ad_height = 15; Some states set building codes statewide and others adopt codes at the local level.
washington state rainfall by month