Q. Cloudy nights are warmer compared to clear cloudless nights, because clouds?
Answer: reflect back heat given off by Earth
Notes: Cloudy nights are warmer compared to clear cloudless nights, because clouds Reflect back the heat given off by earth. At night cloud cover has the opposite effect. If skies are clear, heat emitted from the earth's surface freely escapes into space, resulting in colder temperatures. However, if clouds are present, some of the heat emitted from the earth's surface is trapped by the clouds and reemitted back towards the earth.