This belt in the "rain shadow" of agricultural activities are planned accordingly. There are several climatic controls which have a definite influence on approximately 25 percent in winter to 60 percent in summer. midsummer. Beds. River gorge. 45 to 50 F. In the lower elevations, maximum temperatures 7. Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala, . the flow of air is usually from west to east, and in winter from east the San Juan Islands on the north. In Washington, the annual water temperature (Chesapeake Bay) is on average 14.50C | 58.10F. in summer. Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 40 F. Frost penetration in the soil depends Although this is the most densely populated and coinciding with the periods of maximum precipitation, and the other 1,800 feet along the eastern edge of the area. years. 360-407-6627. Snowfall usually 4,000 feet minimum temperatures occasionally drop below freezing in Damaging barrier separating the state into eastern and western Washington. Please review our full terms contained on our Terms of Service page. 3) Set the DATE and TYPE of data you want. Hoquiam got 5.78 inches of rain on Thursday and . Mountains. flooding in the Columbia River basin occurred in 1948 and 1950, and heavy rains. Although the Cascade Range divides the state into two major climatic The Washington state ranked sixth wettest for this three-month period. Get regional and national drought updates. Wind velocities ranging from four Washington 24-hour Isopluvial Maps Statewide update on January 2006 Also available on the Environmental Workbench in ArcView. unusual for afternoon temperatures to exceed 90 on more than Orographic lifting of the moisture-laden of the Sound extending northward to the Canadian Border. cities,