Longview WA Hourly Weather Forecast Longview , Washington, the weather is mild and enjoyable all year round. Whether you are visiting the vibrant downtown area or adventuring the surrounding scenic landscapes, you can expect comfortable weather throughout your stay. From balmy summers to cool autumns, and from gentle winters to invigorating springs, Longview, Washington offers a plethora of outdoor activities for nature enthusiasts. So carry your sunscreen and parasol, because Longview, Washington's weather is ready to surprise you with its variable and captivating conditions.