why are the top of mountains freezing cold and snowy when they are closer to the sun than the ground is? /u/Moodybab3x No such thing as stupid questions

I always wondered this and my thought process behind it is that the equator is closer to the sun and therefore hotter so why does the same not apply for the top of mountains?

I always wondered this and my thought process behind it is that the equator is closer to the sun and therefore hotter so why does the same not apply for the top of mountains?