Next Monday morning GFS has the air temperature at -10, high of 4-5!
Euro Monday has air temperature down to -5, only peaking in the low to mid single digits, then down to -12 for Tuesday, with a wind chill of -28 and high of 7! Wednesday -13 up to 10.
-12 and -13 would be the coldest in many years, probably since the all-time record in 1993.