It is cool in autumn, and it is hopefully cool inside your refridgerator as well. Beer is best served cool (maybe approximately +12 centigrade). Recently, though, I have been enlightened by e.g. people from countries with higher standards of beer culture that there are numerous different kinds of numerous different beers and optimizing the pleasure is cannot be effectively generally achieved. What I mean to say is that some beers are better warmer.
It is not, howevere, entirely advisable for a person to be cool. Sometimes it is good to control your temper, but in the immortal words of the other guy than John Lennon:
"For well you know that it's a fool
who plays it cool
by making his world
a little colder"