If you planning to travel to North SeaTac Park, SeaTac, 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 1:35 PM. The temperature feels like 49.85 with a humidity level of 91 so dress accordingly. Cloud coverage is 85 percent with visibility at 8 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 9 MPH. At the end of the day don’t miss the sunset at 2:49 AM.