The light breeze is the wind of force 2 on the Beaufort scale. Due to hot and dry conditions, the warm air has a low density and becomes lighter, which makes this lighter air easier to lift, creating a small surface gradient of pressure. The warm air mass is not lonely, it is surrounded by air masses with higher density and pressure. Somewhat cooler air masses above the sea, and higher sea level pressure moving towards the interior of warmer mass. The condition for the movement of air masses, ie wind, is the difference in air pressure. The wind moves from the area of somewhat higher pressure to the lower pressure region, creating a slightly colder, light breeze.
In general, the conditions that could make for just a light breeze is when the surface pressure gradients are weak, especially when currently you're in a dry season with a large high pressure system.
