The hour by hour BBC weather forecast today shows the temperature due to rise from 8º at 11am steadily upwards to 12º at 5am tomorrow. Similar trend for Cambridge and London. How does the temperature keep on rising overnight?
The sun catches fire sometime in the early hours of the morning and rises in the sky, heating the earth. This was explained over at MCiOS I think, a few years ago. At around noon the sun goes "off the boil", the cooling air around it ceases to support its weight and it slowly crashes into the sea for the night. Can't remember who originally explained this. Might have been CdM or Breadmaster. Whoever it was clarified in one paragraph something that so-called "scientists" have failed to explain clearly during my entire life.
(Raak) It happens quite a lot in the UK and higher latutudes. Warm air is being wafted in and its warmth easily obliterates the feeble solar effect at this time of year. There is also no heat loss by radiation with this sort of thing because these airstreams are always cloudy.
I once read something to the effect that the apparent diameter of the sun's disk is just about the same as the light curvature due atmospheric refraction (or is it gravity-bending? that sounds unlikely) when it reaches you at a tangent; with the net effect being that when the sun's disk just touches the horizon it's "really" entirely below it. And it's by this means we know that, like the light in your refrigerator when you close the door, the sun doesn't go out when it falls below the world's edge and everything you've been told otherwise is a damned lie.