If you planning to travel to Mercer Slough Nature Park, Bellevue, 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 3:37 PM. The temperature feels like 35.25 with a humidity level of 77 so dress accordingly. Cloud coverage is 46 percent with visibility at 12.7 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling northeast at a speed of 5 MPH. At the end of the day don’t miss the sunset at 12:18 AM.