Could be evaporator icing up, which is typically caused from a partially undercharged system. It could also be caused by a sticking expansion valve on the Honda, but on the jeep, they normally don't have one, they have orifice tubes. Hondas are also prone to failures of the clutch coils inside the a/c clutch when they get hot. If they have never been serviced, and the vehicles are more than a few years old, they are likely undercharged. R134a has a small molecule compared to R12(used before 1994), and you will lose some refrigerant over time, even in a good, sealed, mobile system thru the hoses. When your vehicle only holds a pound or a little more total, it wont take much to cause an undercharge and icing.
Now to fix it, it needs evacuating and a recharge. Topping off wont correct the issue and may make it worse. Here is why, and don't expect the auto parts stores to understand this. A lot of the stuff the stores sell have no place in vehicles, as they have sealers in them that will only plug up the system. You also have to contend with air and moisture contamination that migrates into the system over time(verified over the years with a refrigerant identifier), that causes corrosion, internal icing and reduced performance. Best bet, take it to a shop that has a modern, digital machine that will accurately charge the vehicle, and a guy who knows how to use it. This means no jiffy lube,etc