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 12:24 PM. The temperature feels like 31.65 with a humidity level of 88 so dress accordingly. Cloud coverage is 73 percent with visibility at 10 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 6 MPH. At the end of the day don’t miss the sunset at 9:51 PM.