Traveling to Sully Historic Site, Chantilly, Virginia? Here is your 6-day weather forecast in the area. Whether it is a warm weather destinations or cold climate don’t forget to consider weather, while you pack your bags for this trip. Start your day when the sunrises at 11:29 AM and don’t miss the sunset at 10:16 PM. Today’s winds are traveling south-southeast at a speed of 10 MPH. The temperature feels like 68 with a humidity level of 74. Cloud coverage is 63 percent with 15 percent visibility. Today’s UV index is 5 make sure to prepare properly. Make sure to plan your travel itinerary to match your travel weather forecast to make the most of your vacation with Reservations.com.