The figures for May are in with the exception of the maximum CET for the 31st which is what is holding up Hadley issuing a final figure. However, from the data I do have I can say what the final figure will be to within 0.01C.
As at the 30th the official and final Hadley CET was 12.52C. This compares to my estimate of 12.53C.
For the 31st I estimate the CET rose to 12.55C. Using my estimate for the maximum CET on the 31st the official Hadley figure would rise to 12.54C.
So the final figure should be 12.54C +-0.01C. See the tables below.
This means that this month our winners are Bertwhistle, Darren S, Deep Powder and Global Warming who all predicted 12.50C. Also possibly cowman with 12.60C if the final number was to come in at 12.55C.
The final numbers show that the CET for the 8th was 17.8C, a date record. For the 9th we officially had 17.6C which equals the date record from 1945.