I HAVE A BABY PLZ HELP. WHY IS MY ROOM SO HUMID?

RiRi , P & PJ’s Mom 💗💖💙
I'm getting ready to move and im at my moms house until I do on July 8th to Colorado. Its 101 in California today and tomorrow will be 107 and the day after will be 108 and so forth. The ac sucks here and basically stops working when it gets to 85. Management does nothing. I want to get a portable ac, but last time I had one in here the room got extremely humid and stayed hot. I'm thinking about purchasing another portable one. Anyone have any tips? I need to make it cool for my baby????