Anonymous asked in Science & MathematicsWeather · 1 decade ago

Why is it the coldest part of the night just before dawn?

8 Answers

  • 1 decade ago
    Favorite Answer

    Good question. I've enjoyed some of the answers you've gotten. But there are none that are right on. Actually, the air continues to cool even for a short time after the sun rises. This occurs for the same reason that maximum temperatures for the day due not occur when we have maximum solar insolation around noon but rather later in the afternoon around 3 - 4 p.m. When the sun comes up it must be absorbed by the earth, the earth must begin to warm and re-radiate longwave infrared radiation which then heats the atmosphere. So there is this lag between solar insolation and heating. Hope this helps a little.

    Source(s): I am a retired meteorologist with nearly 45 years of experience.
  • 1 decade ago

    having spent many, many nights working outside al night at airports i find that during the night the air tends to get very still because there is not much thermal energy left in the air but as dawn gets closer the air starts heating and the wind usually begins to pick up right before dawn, giving a sort of a wind chill effect with the breeze it generates

  • 1 decade ago

    Because the moment before dawn is the time at which the sun has been gone for the longest.

  • 1 decade ago

    after the sun sets, the earth where you are slowly gives off heat (like when you turn off the oven, it's not immediately room temp). Then it has 8 hours of no sun/heat until dawn, slowly losing more and more heat until the sun reappears

  • How do you think about the answers? You can sign in to vote the answer.
  • Anonymous
    1 decade ago

    It has to do with the length of time that it has been dark outside. And, it has been darkest longest just before dawn.

  • ?
    Lv 4
    4 years ago

    Haven't thought about this

  • Anonymous
    4 years ago

    I too want to ask the same question

  • because GOD works in mysterious ways !!!

    Source(s): im a friend of HIS and HE told me sew.
Still have questions? Get your answers by asking now.