I suppose it is. We are a tropical country.
I think it's the electrical discharge bacause of hot and humid.
Change your CMOS battery if that happens frequently.
Problem is the temperature and the humidity.
Before you buy a new battery test currunt battery first.
1.reset your BIOS.
2.clear CMOS(with a jumper):
you have to get rid of power cable before you do this.
3.reset your battery:
you have to get rid of power cable before you get the battery out and on.
After the above, you have to reconfigure the BIOS settings.