"Cold" is a relative term. 
Use the handy list below to overcome the confusion. 

 Degrees (Fahrenheit) 

 * 65F   Hawaiians declare a two-blanket night 
 * 60F   Californians put on sweaters (if they can find one) 
 * 50F   Miami residents turn on the heat 
 * 45F   Vermont residents go to outdoor concerts 
 * 40F   You can see your breath 
         Californians shiver uncontrollably 
         Minnesotans go swimming 
 * 35F   Italian cars don't start 
 * 32F   Water freezes 
 * 30F   You plan your vacation to Australia 
 * 25F   Ohio water freezes 
         Californians weep pitiably 
         Minnesotans eat ice cream 
         Canadians go swimming 
 * 20F   Politicians begin to talk about the homeless 
         New York City water freezes 
         Miami residents plan vacation further South 
 * 15F   French cars don't start 
         Cat insists on sleeping in your bed with you 
 * 10F   You need jumper cables to get the car going 
 * 5F    American cars don't start 
 * 0F    Alaskans put on T-shirts 
 * -10   German cars don't start 
         Eyes freeze shut when you blink 
 * -15   You can cut your breath and use it to build an igloo 
         Arkansans stick tongue on metal objects 
         Miami residents cease to exist 
 * -20   Cat insists on sleeping in pajamas with you 
         Politicians actually do something about the homeless 
         Minnesotans shovel snow off roof 
         Japanese cars don't start 
 * -25   Too cold to think 
         You need jumper cables to get the driver going 
 * -30   You plan a two week hot bath 
         Swedish cars don't start 
 * -40   Californians disappear 
         Minnesotans button top button 
         Canadians put on sweaters 
         Your car helps you plan your trip South 
 * -50   Congressional hot air freezes 
         Alaskans close the bathroom window 
 * -80   Hell freezes over 
         Polar bears move South 
         Viking Fans order hot cocoa at the game 
 * -90   Lawyers put their hands in their own pockets 

below -90

Inuit makes breakfast.
Arctic fox comes out to play.
Goretex stops working.
Rifles jam.
Batteries stop working.
1% of all the cameras work.
Smaller nose and ears are distinct advantages against frost bite.
It takes body heat to thaw frozen seal meat.
Your food is mostly fat. 

The content above was assembled from content by Richard C. Clifford and Chalu Kim. There are a number of similar versions on the 'net. Some are listed below.