Weather today Longview WALong-view , Washington State, the weather is fair and enjoyable all year round. Whether you are visiting the lively downtown area or discovering the surrounding picturesque landscapes, you can expect comfortable climate throughout your stay. From balmy summers to cool autumns, and from temperate winters to cooling springs, Longview, Washington offers a variety of outdoor activities for adventure seekers. So pack your sunscreen and parasol, as Longview, Washington's weather is ready to amaze you with its variable and endearing conditions.