If you planning to travel to Clara Barton National Historic Site, Bethesda, Maryland, 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 11:59 AM. The temperature feels like 40.9 with a humidity level of 75 so dress accordingly. Cloud coverage is 32 percent with visibility at 12 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 15 MPH. At the end of the day don’t miss the sunset at 9:48 PM.