If you planning to travel to Lake Fairfax Park, Reston, Virginia, 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 12:28 PM. The temperature feels like 50.25 with a humidity level of 70 so dress accordingly. Cloud coverage is 24 percent with visibility at 13.7 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 9:58 PM.