If you planning to travel to National Museum of American History, Washington, District of Columbia, United States, 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 9:43 AM. The temperature feels like 81 with a humidity level of 60 so dress accordingly. Cloud coverage is 3 percent with visibility at 9.9 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 8 MPH. At the end of the day don’t miss the sunset at 12:38 AM.