Eagle eyed Dick surmised,

"Looking at the figures you give for 1967, Steve, that March mean of only 4.5C looks suspiciously low when viewed alongside the equivalent 7.0C from the CET."

There was indeed an error, with the actual monthly mean 6.0C - the old city records were taken in Fahrenheit in 1967, and it looks as if there was an error in our conversion to Celsius.

I guess I will have to check out all these pre 1977 records when I retire, there are probably more errors in their somewhere.

So in essence, Spring 2013 was the coldest in Coventry since 1962, not 1967.

best wishes and thanks

Steve J