A/c not as cold

This usually indicates that either the A/C system is low in freon, of the cooling fan is not operating.

Yes,
Some vehicles, if at an idle will do this. You can put a big fan in front of the car- blowing air against/ into the condenser and it will cool down the A/C. This might be because of a restriction at the "pencil" filter or "orifice" filter, on the high-pressure side,(coming out of the "dryer". If this small inline filter is restricted, it could also mean that the system needs to be flushed and recharged. At this time, a mechanic can see what component, could be surrendering the contaminants @ a number of places-the dryer-the compressor or the inline filters, worse case--the compressor. Then again, if the system is either "low" on refrigerant or over charged, it can have an effect like this.