Weather today Longview WALong view , Washington State, the weather is mild and pleasing all year round. Whether you are visiting the vibrant downtown area or adventuring the surrounding breathtaking landscapes, you can expect comfortable climate throughout your stay. From warm summers to crisp autumns, and from gentle winters to refreshing springs, Longview, Washington offers a variety of open-air activities for outdoor lovers. So carry your sunblock and umbrella, because Longview, Washington's weather is ready to amaze you with its variable and charming conditions.