Fact: We all know that during the day concrete absorbs heat and releases it during the night, making urban areas hotter than rural areas.
I observed that after sunset the ambient temperature is going down until late at night when it actually starts to feel hot.
I would assume that soon after sunset the temperature should decrease slowly until sunrise, but that's not the case.
So, I would like to understand which phenomena take place from sunset to sunrise in urban areas.
Take into account that I live in Athens (Greece) where there is a huge urban area and the sea is nearby.