No it was not Dave. I took the data directly from my daily dive reports/rosters. It was 100% up to date at the time I posted it. And my 20 years as an operator reveal that the weather is unpredictable regardless of which month. The things you fight to be "right" about astonish me.
I will ask my assistant if she is willing to update for the past few years as we keep our dive logs for 10 years, but no promises. I certainly don't have time to do it and not really sure it really matters - the information doesn't change significantly from year to year.