How can the outdoor temperature ever increase in the middle of the night? Where is this warmth coming from?
In: Physics
It happens in Australia quite frequently. The centre of the country is a desert and heats up during the day. That heat rises and moves with the wind so it blows over the cooler areas of the country, meaning quite often we get 10C rises in the middle of the night. It is the hot air from the desert moving with wind across the rest of the country.
The same effect will happen to lesser extents all around the world for a variety of geographical reasons.
Additionally, there are established air currents that push hot air from the middle-east across northern europe (the gulf stream). That is what prevents the UK getting as cold as neighbouring scandinavia.
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