Yes, typically, when you set a car's air conditioning (A/C) system to the lowest temperature setting, it will provide colder air. The A/C system in a car works by removing heat from the air inside the vehicle and releasing it outside, resulting in cooler air being circulated within the cabin.
When you lower the temperature setting, it instructs the A/C system to operate at maximum cooling capacity. The system adjusts the cooling output by regulating the flow of refrigerant and adjusting the compressor speed. This leads to a lower temperature of the air being blown into the cabin, providing a cooler and more comfortable environment.
It's worth mentioning that the A/C's effectiveness can also depend on factors such as the outside temperature, the condition and maintenance of the A/C system, and the overall efficiency of the car's cooling system.