What is the lowest temperature possible

The lowest temperature possible is 0° Kelvin, or - 459.67° Fahrenheit, or - 273.15° Celsius.

At the physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale.