If you planning to travel to Post Alley, Seattle, 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 3:35 PM. The temperature feels like 34.1 with a humidity level of 69 so dress accordingly. Cloud coverage is 76 percent with visibility at 15.8 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 3 MPH. At the end of the day don’t miss the sunset at 1:11 AM.