Which two temperature scales are commonly used in the United States?

The two temperature scales that are commonly used in the United States are Fahrenheit (°F) and Celsius (°C).

In the United States, Fahrenheit is the preferred scale for everyday temperature measurements such as weather forecasts, cooking, and measuring body temperature. It was developed by Daniel Gabriel Fahrenheit in the early 18th century. In the Fahrenheit scale, water freezes at 32°F and boils at 212°F (at sea level).

Celsius, also known as centigrade, is used primarily in scientific contexts within the United States. It is the standard unit of temperature in the metric system, which is used in most other countries around the world. The Celsius scale was developed by Anders Celsius in the 18th century. In the Celsius scale, the freezing point of water is 0°C and the boiling point is 100°C (at standard atmospheric pressure), which makes it simple to remember. This scale is part of the metric system and is widely taught in schools across the United States despite the everyday use of Fahrenheit for most temperature measurements.