I just did a QUICK scan back to Dec 2010 for any days in Dec-Feb that reached 68 or higher. There is a decent chance I missed one or two but these are most of them. Just listing months and temps.
Feb 2011 (1)-68
Dec 2013(1)-70
Feb 2017(5) 68,68,69,75,76
Feb 2018(2) 77,79