Sigh! How about your own statements, here:
I did not predict it at 18 degrees, low but not that low, again most will pass this off as an observation error with only 12 degrees between official numbers and mine.

Or here:
You and I know the difference between 18 and 30 degrees,the common would not even notice.

Eighteen plus 12 equalled 30 last time I checked.

Don't you even know what you have written previously?