Default Warm makes my phone go weird...

So, I don't know if only I have had this thing going on, Or more of u have. But when it's started to get warm outside, 25c,my phone starts acting weird no matter what ROM I'm using its the same... So if I have my phone in the pocket it will more likely lock itself up even tho I wear the same clothes as I would do normally where it never happens, if its warm outside it will just lock itself up... My phone starts having more problems with touch (still no matter ROM), so forexample when I lock it up it doesn't respond to anything even tho its not sweaty Or anything . and just alot of small problems happens... Anyone else experienced this?

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