Originally Posted by
The Oberon
Langley, serious, but maybe dumb, question. It seems to me, a layman, that a lot of the places where 40deg.was exceeded are subject to non meteorological influences making it seem hotter. I am aware that thermometers are contained in louvered boxes but when these boxes are sited on a large concrete/tarmac area with hot jet exhaust coming from aircraft movements, Coningsby/Heathrow for example, this is going to make things seem hotter or is it my imagination?
They are not sited on large.concrete or tarmac areas. Heathrow weather station is N of the runway and I imagine Congingsby will be on the grass near the tower.
See section on siting in
https://en.wikipedia.org/wiki/Stevenson_screen