Which of the following is the correct interpretation of the temperature in METAR KMAF?

In the METAR report for KMAF, the temperature is stated as a specific value typically measured in degrees Celsius, which is standard in aviation weather reporting. When interpreting the temperature in a METAR, the format is usually given in whole degrees Celsius. Therefore, if the METAR indicates a temperature of 27 without any additional qualifiers or a prefix indicating Fahrenheit, it is understood to be in degrees Celsius. This aligns with international aviation standards.

The other choices suggest temperatures that are either in Fahrenheit or imply conditions that are not relevant to the stated data in the question. Since METAR reports primarily utilize Celsius for temperature reporting, the correct interpretation leads directly to the conclusion that the reported temperature of 27 degrees is in Celsius.