The Northern Mountain had the most days with ice in 2004-2005 through 2008-2009. Central Coastal Plain in 2004-2005 through 2008-2009 had the least days with ice. Northern Coastal Plain came in with the next smallest amount of days with ice. The Southern Piedmont as well as the Southern Coastal Plain had the same number of days with ice.
As you can see in the graph to the right the Northern Mountains has the highest number of days. In 2004-2005 the Northern Mountains had the most days with ice. From 2005-2008 the Northern Mountains declined with the number of days measurable ice was recorded. The Northern Coastal plain declined from 2004-2005 to 2008-2009. Southern Piedmont and Southern Coastal Plain dropped to 1 day of ice in 2005-2008. In 2003-2006 the Central Piedmont dropped to its lowest. Later the Central Piedmont rose again, and stayed from 2006-2008. Most of the climate divisions stayed around 5-8 days with ice in 2008-2009 expect the Northern Mountains. The Northern Mountains in 2008-2009 was roughly as high in days with ice as Northern Mountains in 2004-2005. The Southern Coastal Plain never declined in days with ice after 2005-2006. The Southern Mountains there was a zigzag pattern from 2004-2005 through 2008-2009 with its ups and downs. The Central Coastal Plain never really had many days with ice. In 2006-2008 the days with ice rose, then stayed for days with ice in the Central Coastal Plain. The Southern Piedmont, however, was like the Central Coastal Plain, but instead the days with ice decreased. With the Northern Piedmont, there was also a zigzag pattern except in 2006-2008, Northern Piedmont's days with ice stayed the same.