Climate Snoqualmie - Washington. °C | °F. Climate data for snoqualmie falls, Longitude: -121.836, Latitude: 47.5413. Average weather Snoqualmie, WA - 98065 - 1981-2010 normals. Jan: January, Feb: February, Mar: March, Apr: April, May: May, Jun: June, Jul: July, Aug: August, Sep: September, Oct: October, Nov: November, Dec: December.