Longview TX Weather Forecast Long view , Washington State, the weather is moderate and pleasing all year round. Whether you are touring the vibrant downtown area or exploring the surrounding breathtaking landscapes, you can expect comfortable climate throughout your stay. From hot summers to crisp autumns, and from mild winters to cooling springs, Longview, Washington offers a plethora of alfresco activities for nature enthusiasts. So pack your sun lotion and umbrella, because Longview, Washington's weather is ready to amaze you with its unpredictable and charming conditions.