In warm weather the mason should wait this number of days before laying concrete block on the footing? Why and what are the benefits?

Temperature conditions when pouring concrete
The air temperature is not the ultimate factor that determines whether concrete should be poured or not. Along with air temperature, the amount of humidity, speed of wind, surface temperature on which concrete is to be set, water and concrete in bag all play a major role in successful masonry. Some conditions are beyond human control, but temperature of mixed material is as much a vital factor as the air temperature. Temperatures above 90 F should be dealt with utmost care. Even 90 F poses a problem with high wind speed and low humidity. What the masonry industry...