Why the coldest part of a night is most of the time at dawn? How do we explain this signifiant temperature drop?
EDIT: I get answers telling that’s because sun has been out the longest when sun rises again. Indeed it makes sense that the night will continuously go coolest, but the weird thing is: There is a real, proper drop on the thermometer every morning at the dawn, event if we stayed at 5°c all night long, at the very first lights, it will drop to 4°c and then go back to 5°c a moment later (actually happened again this morning).
The reason of this radical drop is my question.
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In: Geology
> There is a real, proper drop on the thermometer every morning at the dawn,
This seems so unlikely that you’ll need to provide some evidence. [Here are the numbers](http://www.bom.gov.au/products/IDN60903/IDN60903.94926.shtml) where I live and there’s no sign of weird dips just before dawn (7:20am currently) over the last few days. Can you find something similar where you are?
> event if we stayed at 5°c all night long, at the very first lights, it will drop to 4°c and then go back to 5°c a moment later (actually happened again this morning).
On this occasion I’d guess that it went from 4.5°C down to 4.4°C and then back up again. Those numbers round to 5°C and 4°C which makes it seem more dramatic.
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