You know...you never can tell about the weather. One year it's warm, next year it's freezing.
Take a look at the records of Buffalo NY Airport from 1922 to 2011.
If you look at what happens on the mean temperature for Dec from year to year... it has no pattern, even the coldest lows from 1939 to 1945 did not correspond into lowest mean temperature months for Dec.
1980 looks aweful cold after a warm 1979.
A_T & FF .... you can take that to the bank.
These forecasters that say it's going to be warmer than normal or colder than normal for a region, are just pulling your leg. They don't and can't know and are probably just opening up the Farmer's Almanac which relies on astrology and taking a profit on causing NG markets to move.
Just do the opposite .