so its been really cold all of a sudden here in Albuquerque with blowing snow and such and it all just came out of no where we went from 75 to 80 degree days to blowing snow and 42 degree highs in just one day. but anyways i went to start my civic this morning and it just kept cranking and i have noticed this that when its gotten cold out side the car wont start(i bought the car in july). so i wondering what could be the cause i took the battery into autozone and surprisingly they told me it was fine. so ive heard u can get water into ur fuel lines somehow and so other things it could be but how would i go about finding the problem in the first place where should i start

 

Use gasline antifreeze and keep your fuel tank at least half full to keep from freezing condensation in the tank.
How old is your battery?