Concrete that is poured on cold days is more likely to crack relative to concrete poured on warm days. ?

Yes, this statement is generally true. Concrete tends to set more slowly in colder temperatures, which can lead to a higher likelihood of cracking. When concrete sets too slowly, there is an increased time for shrinkage to occur, and the potential for freeze-thaw cycles can also contribute to cracking. In contrast, concrete poured on warm days allows for quicker setting and less potential for cracking.