I would think ithas some thing to do with thermo drafts.
The time just before dawn is called the "pre-dawn" or "early morning hours." This is the period when the sky starts to lighten but the sun has not yet risen.
I think the proverb goes: "It's always darkest before the dawn."
Typically, the coldest part of the night is just before sunrise, around dawn. This is because during the night, the Earth loses heat through radiation, and without the sun's warmth, temperatures continue to drop until dawn.
BTD - Before the Dawn - was created in 2010.
Before the Dawn - novel - was created in 1935.
The ISBN of Darkness Before Dawn is 0689830807.
Before the Dawn - band - was created in 1999.
At the house on the bottom right where dawn is.
Darkest before the dawn is not a biblical saying
The duration of Decision Before Dawn is 1.98 hours.
The duration of The Hour Before the Dawn is 1.25 hours.
Darkness Before Dawn has 272 pages.