For any weather geeks out there I can recommend http://weatherspark.com/
It has forecasts in a sort of graphical form and it has historical data from met stations all over the world. So you can look at what the weather was doing in Heathrow in the Summer of 76.
It is still in beta so there may be some rough edges but I like it..
What a fabulous site, didn't think I was a weather geek but I've earmarked the site, thanks :)
That's a cracking find, looks quite accurate for the last few days here - I guess the acid test is the next few days.
I like it.