Longview Washington 14 Day Weather Forecast The Weather Long view , Washington State, the weather is moderate and pleasing all year round. Whether you are exploring the dynamic downtown area or discovering the surrounding picturesque landscapes, you can expect comfortable conditions throughout your stay. From hot summers to crisp autumns, and from temperate winters to invigorating springs, Longview, Washington offers a abundance of open-air activities for nature enthusiasts. So bring your sunscreen and umbrella, as Longview, Washington's weather is ready to amaze you with its variable and captivating conditions.