Longview Washington Hourly Weather Forecast The Weather Long-view , Washington, the weather is mild and delightful all year round. Whether you are touring the lively downtown area or adventuring the surrounding scenic landscapes, you can expect content climate throughout your stay. From balmy summers to crisp autumns, and from moderate winters to invigorating springs, Longview, Washington offers a variety of outdoor activities for adventure seekers. So pack your sunblock and umbrella, because Longview, Washington's weather is ready to surprise you with its changeful and charming conditions.