Wow an awful lot of info there Mr Data, but very interesting thank you. I find it hard to believe that a CET in one month can have a corresponding effect on a CET in a later month as I think it all boils down to the chaos theory. Mind you seeing as this June was very warm from what i recall, then I'd love to see a cooler December this year. Those 2 Decembers that had the CET of above 5C, were they recent or way back when?