Not every time is ideal for playing football.Our bodies have cycles during the day based on our way of life.You should plan around these cycles to maximize your performance.Our body's temperature is one of these cycles and varies time to time.It is highest in the late afternoon and lowest early morning.The higher the body temperature the better your physical performance.In this case you should plan playing playing late afternoon.
If you have not eaten for several hours you should avoid  playing.Also avoid playing on a full stomach as the digestion requires a lot of energy.