Longview WA Hourly Weather Long-view , Washington State, the weather is mild and delightful all year round. Whether you are visiting the lively downtown area or adventuring the surrounding breathtaking landscapes, you can expect comfortable weather throughout your stay. From hot summers to cool autumns, and from temperate winters to invigorating springs, Longview, Washington offers a variety of open-air activities for adventure seekers. So bring your sunscreen and parasol, as Longview, Washington's weather is ready to amaze you with its unpredictable and charming conditions.