If you planning to travel to Squak Mountain State Park, Issaquah, Washington, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 3:40 PM. The temperature feels like 36.95 with a humidity level of 67 so dress accordingly. Cloud coverage is 59 percent with visibility at 13.1 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling northeast at a speed of 7 MPH. At the end of the day don’t miss the sunset at 1:00 AM.