What is the reporting method for temperature and dew point in METAR reports?

In METAR reports, temperature and dew point are reported in degrees Celsius. This standardized reporting method is used globally to ensure consistency and clarity in aviation and meteorological communications. Celsius is widely adopted in international aviation practices, which helps pilots, meteorologists, and other stakeholders interpret weather conditions accurately, especially given the varying climatic norms across different regions.

Reporting temperature in Celsius avoids confusion that might arise from the use of Fahrenheit, which is less common in international contexts. Additionally, using whole degrees keeps the information simple and straightforward for quick assessments, which is essential during critical situations in aviation.

While Kelvin is a measurement system utilized in scientific contexts, it is not appropriate for METAR reports, which are intended for practical use by pilots and air traffic controllers who require readily comprehensible data. Therefore, understanding that METAR differentiates itself through the exclusive use of Celsius for reporting temperature and dew point is vital for interpreting weather data effectively.