Building a thermometer is a matter of precise technology—putting just the right amount of mercury into a specially designed glass tube, for instance—but determining which numbers to use on the ...

If the forecast calls for 32 degrees Fahrenheit in Houston, it’s time to bundle up and prepare for possible ice outside.

Depending on your location, the Weather app will show the temperature in either Fahrenheit (°F) or Celsius (°C). Some users may want to change from one to the other but have no idea how to ...