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 12:50 PM. The temperature feels like 59.55 with a humidity level of 69 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.1 percent. Today’s UV index is 8, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 3 MPH. At the end of the day don’t miss the sunset at 3:20 AM.