I've noticed it gets colder as you drive it more... I just had my TC tinted with ceramic tint and also did my windshield.... It gets too cold even on #2... I'd recommend tinting it to not make your a/c work harder to cool the cab...
If you start your car and it's not moving for 3-5 mins, maybe try to gas it a little and see if it gets colder... If it does get colder, the a/c system may be low on freon...