If you planning to travel to Big Twin Lake, Winthrop, 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 3:49 PM. The temperature feels like 33.35 with a humidity level of 99 so dress accordingly. Cloud coverage is 75 percent with visibility at 4.2 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 1 MPH. At the end of the day don’t miss the sunset at 12:07 AM.