When do "winter weights" specifically apply for aircraft loading?

The correct application of "winter weights" for aircraft loading is from November 1 to April 30. During this period, airlines adjust their weight limits and loading procedures to account for the additional weight that can result from winter operations, such as de-icing and snow removal, as well as potential changes in passenger and cargo loads associated with the winter season.

In winter months, the potential for ice and snow accumulation can lead to increased operational challenges, requiring careful consideration of how these factors affect aircraft performance and safety. Using winter weights ensures that the aircraft is loaded within safe parameters, accommodating the changes in flight conditions that can occur during colder months.

This specific timeframe was established to address seasonal fluctuations in operational requirements and helps maintain the safety and efficiency of flight operations.