If you planning to travel to Millersylvania State Park, Tumwater, 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 3:23 PM. The temperature feels like 42.6 with a humidity level of 85 so dress accordingly. Cloud coverage is 55 percent with visibility at 11.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 12 MPH. At the end of the day don’t miss the sunset at 12:32 AM.