First off: the wave colder air that arrived over the weekend with the ample rainfall will bottom-out in the low temperatures overnight. If you are concerned about widespread frost or freezing temperatures - don't be - as temperatures will remain several degrees above freezing. Overnight low temperatures will fall into the upper 30s to lower 40s in the urban heat island areas and areas near lakes therefore; the foliage should be safe.
After; the remainder of the week looks great with warmer temperatures once again to spread back into Southeast Lower Michigan along with predominant dry conditions. This will allow outdoor work and moving outdoor plants, indoors where necessary into at least through the weekend.
Latest model indications have been leaning toward colder solutions from mid next week into the last weekend of October; just before Halloween and into Halloween at this time.
Looking at the broader indices picture; a positive EPO will aid in pumping up the ridging of the west coast of Canada and the US - while a negative NAO evolves and slides into place over eastern Canada in partial response.
Checking more into the "core" of the cold with the Arctic Oscillation shows us a definitive change to a negative phase into next week.
Closer to home looking at the winds aloft features for the change next week with a far glance toward Halloween. Note the cold air will come in waves; basically by mid next week, then again the last weekend of October then another around Halloween. Please remember these maps are one models /GFS/ interpretation of the atmospheric evolution of the colder weather. We only look at this to note the trend of pattern change and to a lesser extent; the amplitude and timing.
Any notable changes to the pattern projections and more particulars to the outlook; look for updates.