In METAR syntax, how is a temperature of 6 degrees Celsius represented?

The correct representation of a temperature of 6 degrees Celsius in METAR syntax is typically shown in a format that provides both the ambient temperature and the dew point temperature. The representation "T=6°C, Td=4°C" clearly specifies the temperature (T) and the dew point temperature (Td).

In standard METAR reports, temperatures are often depicted in degrees Celsius with a format like "T" for temperature and "Td" for dew point temperature, providing a clear understanding of the current atmospheric conditions. This clarity is essential for pilots and meteorologists who rely on precise information for decision-making.

The other representations, while they might seem plausible, do not adhere to the commonly accepted METAR format. For instance, the format typically used in METAR reports for temperature does not include separate numerical representations without the necessary temperature indicators.