[Dave K]

These are the accepted boundaries, so we have for example in Inner London the current met stations for St James Park, Hampstead, Greenwich and old ones like Camden Square, Kensington Gardens. It only matters insofar as minima for Westminster are clearly going to be much higher than those for outer Barnet so it only matters to differentiate a suburban/semi-rural are with the more densly populated zones (which was even more confined in the early/mid 19th century) and UHI for summer heat.

[Dave K]

StephenS, on 21 March 2012 - 18:19, said:

I totally agree. I think it's unlikely that we'll see such low temperatures in London (however liberally one defines the boundaries). But I'm reasonably comfortable with the proposition that they may have been reached in the past, in what were at the time quite rural locations. We'll never know of course...

This is quite interesting, though it lacks citations:

http://www.netweathe...r-history;sess=

It has been suggested in Trevor Harley's site for example that some of the extremely low London temperatures of yore may well be more representative of a grass minumum than air minimum, but without knowing the exact details of instrument exposure, calibration and screening (if anyone noted or made a painting!), as you say we shall probably never know.

[Mesogeiakos]

yiah but we have the office for National Statistics with different definitions.Anyway lets go by your map Dave.

This post has been edited by Mesogeiakos: 21 March 2012 - 18:48

[Ian Williams]

Mesogeiakos, on 21 March 2012 - 18:23, said:

Fair enough Dave.What is a good definition in your books for say Inner London and then Outer London boroughs bsc we still get conflicts over these definitions as well...


Which would you class as Outer London Boroughs and are we going to stick with the strict administrative limits of each Borough?



I think it was closer to -15C actually...if memory serves me well it must have been -14.8C

Northolt lowest in 2010 was -14.2C on 20th December which i remember from the Uk challenge project, Heathrows coldest that winter was -9.4C and St James Park was -5.3C

1	Pershore (United Kingdom)	-18.7 °C
2	Castlederg (United Kingdom)	-18.0 °C
3	Benson (United Kingdom)	-17.6 °C
4	Capel Curig (United Kingdom)	-16.8 °C
5	Crosby (United Kingdom)	-16.5 °C
6	Shobdon (United Kingdom)	-15.5 °C
7	Redesdale (United Kingdom)	-15.2 °C
8	Shap (United Kingdom)	-14.9 °C
9	Woodford (United Kingdom)	-14.8 °C
10	Farnborough (United Kingdom)	-14.2 °C
11	Northolt (United Kingdom)	-14.2 °C
12	Yeovilton (United Kingdom)	-14.2 °C

http://www.ogimet.co...ra=00&Send=send

This post has been edited by Ian Williams: 21 March 2012 - 18:50

[Mesogeiakos]

So my memory sucks Thanks Ian!