What do the numbers 18/17 represent in a weather report?

The numbers 18/17 in a weather report represent the temperature and the dew point, both measured in degrees Celsius. This notation indicates that the current air temperature is 18 degrees Celsius and the dew point is 17 degrees Celsius.

Understanding these two measurements is crucial for interpreting weather conditions. The temperature indicates how warm or cold the air is, while the dew point provides information about the amount of moisture in the air. A dew point close to the temperature suggests that the air is humid, and there's a higher likelihood of precipitation or fog.

In this context, recognizing the correct interpretation of temperature and dew point is essential for aviation and unmanned aircraft operations, as weather conditions can significantly impact flight safety and planning.