If you planning to travel to Lake Sammamish 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 1:49 PM. The temperature feels like 59.599999999999994 with a humidity level of 88 so dress accordingly. Cloud coverage is 75 percent with visibility at 12 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 7 MPH. At the end of the day don’t miss the sunset at 2:13 AM.