Temperatures have been below normal in 75% the US since October 1, 2013, with the average departure being -1.29 degrees.
But it is worse than it seems. Most of the 25% percent above normal has been barely above normal, while the 75% below normal has been generally much below normal. The next graph shows percentage area weighted by the deviation.
It isn’t warming up, either. 75% of the US has also been below normal temperature this month.