Longview WA Daily Weather Longview , Washington State, the weather is fair and pleasing all year round. Whether you are touring the lively downtown area or exploring the surrounding picturesque landscapes, you can expect content climate throughout your stay. From hot summers to cool autumns, and from mild winters to invigorating springs, Longview, Washington offers a abundance of alfresco activities for outdoor lovers. So bring your sunblock and umbrella, as Longview, Washington's weather is ready to delight you with its changeful and charming conditions.