Longview Texas 7 Day Weather Forecast The Weather NetworkLong-view , Washington State, the weather is gentle and enjoyable all year round. Whether you are touring the vibrant downtown area or exploring the surrounding breathtaking landscapes, you can expect content weather throughout your stay. From balmy summers to brisk autumns, and from moderate winters to cooling springs, Longview, Washington offers a abundance of alfresco activities for adventure seekers. So bring your sunblock and parasol, as Longview, Washington's weather is ready to impress you with its unpredictable and charming conditions.