Early Frost Means?

An early frost should not be taken as a sign that the upcoming winter will be a cold one.  Likewise, an early snow is not an indication of a snowy winter.  While these preseason jolts of weather can be a shock to the system, they are more the result of a random act of weather than a sign of impending doom.

In order to get temperatures to fall below freezing several weeks earlier than average, it takes a cool air mass that times itself just right so that light wind and clear skies happen right around sunrise.  A cold winter requires a weather pattern through the winter that frequently brings air from high latitudes into our region.  Similarly, an early snow is not an indicator of a persistent snowy pattern.

Note:  this is not to say that we will not have a mild winter.  This is just to say that an early frost is not a sign.