The computer is turned on, and the motherboard temperature is 62 degrees.

It is normal for the temperature to rise when the weather is hot. The south bridge is not too loose. You can do your own DIY. Its calorific value is not big, mainly in the North Bridge. 60 degrees is not too big. There is no danger if it does not exceed 80 degrees. If it doesn't need to be beautiful, put the side cover of the chassis aside, otherwise you can buy a radiator of the north bridge, dozens of pieces.