Sometimes I feel that way but then I think about how many cold Marchs and Aprils we’ve had recently...although this year March was finally a torch again but then April took a dump on our face.
Its also funny, we were getting so many warm Novembers for a while but the last couple have been absolutely frigid including our coldest November day on record in 2018. Recently, February has been a torch too after a string of cold and snowy ones from 2013-2015.
Going on a strictly empirical analysis, December has warmed the most in our area (about 0.5F per decade) while January (about 0.15F per decade) has warmed the least out of the winter months.
If you want the one month that hasn’t warmed at all (at least quickly looking at ORH airport since it’s inception in 1947)...October is your month.