That link has sortable columns for record temperatures for Rutland where official temperature measurements are recorded, going back to 1916 when they began keeping the records.
Temperatures at Killington tend to typically be about 10 degrees cooler than Rutland due to topographical factors.
This weekends weather forecast is nowhere near record breaking for January as a whole. For that particular calender date, perhaps a bit closer, but for the month as a whole, it's incredibly insignificant, as well as being a very short lived thaw.
"It's more fun being a pioneer then just another clone doing the same old thing."