How long does a civil ceremony take?

So we are getting married at a Farm and the ceremony will be a civil ceremony, maybe the officiant will read a religious citation but nothing more than that, how long does this type of ceremony take? I’m trying to set my ceremony time and I want us to take nice pictures while the sun is still out, I’m getting married in Septemberin Virginia. I’m scared that if I have my ceremony at 4:00 pm then my pictures will start at around 6:00 pm and it will be dark. Should I have my reception at 3:00 pm instead? Would it be too hot at that time? This is really important to me because I’ve heard a lot of people regretting they didn’t plan this beforehand and not having good pictures because of this. Any advice?