Longview WA Hourly Weather Forecast Longview , Washington, the weather is pleasant and agreeable all year round. Whether you are touring the dynamic downtown area or adventuring the surrounding picturesque landscapes, you can expect relaxing climate throughout your stay. From warm summers to brisk autumns, and from temperate winters to refreshing springs, Longview, Washington offers a plethora of open-air activities for nature enthusiasts. So pack your sunblock and parasol, as Longview, Washington's weather is ready to surprise you with its unpredictable and endearing conditions.