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 3:20 PM. The temperature feels like 43.15 with a humidity level of 74 so dress accordingly. Cloud coverage is 71 percent with visibility at 13 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 10 MPH. At the end of the day don’t miss the sunset at 12:26 AM.