Where snow has fallen in modern times...

[B1987]

Here is a demonstration of London's heat island.

Average winter temperatures for Central London:

Dec: 8.6C / 5.4C
Jan: 8.5C / 5.1C
Feb: 8.9C / 4.8C

Average winter temperatures for Heathrow Airport (15mi/24km west of centre).

Dec: 8.3C / 3.6C
Jan: 7.9C / 2.8C
Feb: 8.4C / 2.7C

[nei]

this page gives the chances of a white thanksgiving. If you click on traveling to another city below, it shows the chance of a white thanksgiving in seattle is 0. Oops.

Home :: Northeast Regional Climate Center

[Trimac20]

Originally Posted by B1987

Here is a demonstration of London's heat island.

Average winter temperatures for Central London:

Dec: 8.6C / 5.4C
Jan: 8.5C / 5.1C
Feb: 8.9C / 4.8C

Average winter temperatures for Heathrow Airport (15mi/24km west of centre).

Dec: 8.3C / 3.6C
Jan: 7.9C / 2.8C
Feb: 8.4C / 2.7C

Average for the past year? 5C is absurdly warm, lol.

[B1987]

Heathrow's is for the past 30 years, Central London is for the past 19 years as it hasn't had a weather station for very long.

[Weatherfan2]

Originally Posted by B1987

Here is a demonstration of London's heat island.

Average winter temperatures for Central London:

Dec: 8.6C / 5.4C
Jan: 8.5C / 5.1C
Feb: 8.9C / 4.8C

Those numbers are Waaay over inflated.

1971-2000 average for Greenwich, London:

Dec: 8.8°C / 3.3°C
Jan: 7.9°C / 2.4°C
Feb: 8.2°C / 2.2°C

And the London City Airport figures for the last 22 years, 1988 - 2010:

Dec: 7.5°C / 4.3°C
Jan: 7.7°C / 4.3°C
Feb: 8°C / 4°C

[B1987]

Those numbers are for the Weather Centre in Bloomsbury, right in the heart of the heat island. Greenwich is about 5-7 miles from the centre of London, City Airport even further away.

[ben86]

Originally Posted by B1987

Those numbers are for the Weather Centre in Bloomsbury, right in the heart of the heat island. Greenwich is about 5-7 miles from the centre of London, City Airport even further away.

Oh, Bloomsbury, I used to work there. I'll check it out next time I'm round that way. Those are the temperatures experienced by millions of people, yes, but is it an official site though? I heard the temperatures were taken on a rooftop and so weren't official. Where I live in north London seems cooler, noticeably so today.