Q. What is the reason behind the less dew on cloudy nights?
Answer: In cloudy nights the radiation takes place very slowly
Notes: Dew usually forms the night following a warm day and will stick around until early the next morning. Overnight, the Earth radiates heat from the ground into the air. As the Earth radiates this heat, the ground cools. As the ground cools, it cools the layer of air closest to the surface.
Cloudy nights are less likely to experience dew formation at the Earth's surface because radiation cooling is reduced. Wind will also reduce the chance of dew formation as it reduces the humidity of the air in contact with the ground.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 43 in 12. Various Topics on Climate Change in above course in App.