GROWING DEGREE DAY - GRAPH

[otorongo]

Central London is almost 2 degrees warmer (24hr average) than Greenwich.
I wonder how many GDDs that would be?

It's good to see parts of England better than parts of Australia and NZ, but you've chosen some of the coldest for your chart. Hobart is in the very south of Tasmania.
How would that compare to tropical locations like Darwin?

[otorongo]

Found a calculator:
http://www.degreedays.net/#generate
(you have to select 'cooling degree days' and base 12C)

For the Cricklewood station (which is a bit cooler than my location), it works out to 1077.

For a comparison:
Malaga airport - 2612
Tenerife Sur - 3340
Manaus, Brazil - 5543

[Rod]

Central London is almost 2 degrees warmer (24hr average) than Greenwich.
I wonder how many GDDs that would be?

It's good to see parts of England better than parts of Australia and NZ, but you've chosen some of the coldest for your chart. Hobart is in the very south of Tasmania.
How would that compare to tropical locations like Darwin?

Is there any temp data for central london anywhere ? - It would be good to see the GDD's for this.

I chose Hobart as a comparison to the UK, because of the fact that it is one of the coolest parts of Australia ( many palm species can be grown there ) so that you could compare to parts of the UK.

I just worked out the GDD's for Manaus Brazil like you did. But i did it manually to see if that calculator was accurate: I got ~ 5606 GDD's

[otorongo]

The calculator uses data from the last 5 years, or whatever you select from the dropdown. Our results are pretty close, so I'll trust it

I chose Hobart as a comparison to the UK, because of the fact that it is one of the coolest parts of Australia ( many palm species can be grown there ) so that you could compare to parts of the UK.

Sure, I was just curious how far from the tropical ideal we are.