Well, who would have thought that Heathrow would record its 2nd coldest May day on record in 2007? After so many records falling during the last year for warmth, amazing indeed! Just a pity it wasn't the coldest day on record really. Perhaps we'll get some record cold days later in the year like in December!
I should the think the May CET will end up at 12. Colder than expected but still above average.