Every year when the temp drops this crosses my mind, but then the left side & the right side of my brain start to fight, I never figure out the answer, the winter season comes to an end, & I am left wondering ... am I crazy?

 Sooooo, 
my car runs better during the colder months, doesn't it? 
I swear that puppy is much peppier & I notice it the most when I am driving very hard & very fast. 
I'm thinking that the lower temps improve conditions & allow my engine to preform better ... HOWEVER ... this is where the left & right side of my brain start arguing ... because if that was indeed the case .... wouldn't NHRA & NASCAR, & really all racing in general, take place in the colder months instead of the warmer months?

 I'm really confused ... so who can alleviate my upcoming winter of confusion & break this down for me?