Well if your planning to visit America, I have a tip for you. People from most nations have to convert Fahrenheit to Celsius for an understanding of the recent extreme weather within the U.S.. I found this here: Fahrenheit to Celsius temperatrue conversion merges in cold snap At forty below zero, the Fahrenheit and Celsius temp scales converge for one brief degree. Fahrenheit and Celsius had a brief encounter on the exact same point of the thermometer in International Falls, Minn., on Jan. 21, as the temperature eventually bottomed out at minus 46, or 43 below zero Celsius.