The retreating monsoon and winter season can be explained based on various factors such as duration, temperature, pressure and wind, precipitation, and characteristic features. Let's discuss each of these factors in detail:

Duration:
- The retreating monsoon season usually occurs from October to November in the Indian subcontinent.
- The winter season follows the retreating monsoon and typically lasts from December to February.

Temperature:
- During the retreating monsoon, the temperature starts to decrease gradually as the monsoon rains start to withdraw.
- In the winter season, temperatures drop significantly, especially during the night, as cold air masses from the north and northeast regions dominate.

Pressure and Wind:
- The pressure systems during the retreating monsoon season change from low-pressure areas to high-pressure areas.
- The withdrawal of the monsoon leads to the establishment of high-pressure systems over the Indian subcontinent.
- As a result, dry and cool winds start blowing from the land towards the sea.
- In the winter season, the Indian subcontinent comes under the influence of the northeast trade winds, which blow from the land to the sea.

Precipitation:
- During the retreating monsoon, precipitation decreases significantly compared to the monsoon season.
- The withdrawal of the monsoon results in a reduction in rainfall activity.
- In the winter season, rainfall is relatively low and occurs mainly in the form of scattered showers.

Characteristic Features:
- The retreating monsoon season is characterized by a transition from a wet and humid climate to a relatively drier and cooler climate.
- The skies become clearer, and there is a decrease in cloud cover.
- The winter season is marked by cold temperatures, especially in the northern parts of the Indian subcontinent.
- Fog and mist are common during this season, especially in the early morning hours.
- The vegetation starts to dry up during the retreating monsoon, and in winter, deciduous trees shed their leaves.

In conclusion, the retreating monsoon and winter season are distinct periods in the Indian subcontinent. The retreating monsoon season is a transitional phase characterized by decreasing rainfall and temperature, while the winter season brings colder temperatures and drier conditions. Understanding these factors helps in comprehending the changes in weather patterns and climatic conditions during these seasons.