Detailing

60f is 15 c which is good for a vehicle ac unit
the lowest setting approaches 12 c and that is for an ac in excellent condition
you can help by closing the external vent so that the cabin air gets colder by recirculation
clean the fins of the evaporator under the dash,
tint the car windows all round except the windscreen
if you have climate control shut off the heater operation as well

before you do this I would get some wooden qtips - the long ones auto detailers use. take off the air filtrer assembly and spray carb cleaner into the air\fuel intake and use the qtip to wipe out the inside of the intake. I had the same problem with my highlander a year ago and this fixed the problem.

hi one of your plastic vents has come of your main vent please check that all vents are ok in there right spots cheers peter