10F Increment Low Temperature Days per Year

This is the companion to the 10°F high temperature post. It shows the number of days per year with low temperatures in each 10F temperature range. 

10F Increment High Temperature Days per Year

These maps show the number of days per year in 10°F temperatures. For example, the map titled "Days With a High Temp in the 90°Fs" represents the average number of days with a high temperature between 90°F and 99°F - NOT 90°F AND ABOVE. This last part tends to cause a lot of confusion. Any number of people have made maps of days with a high of 90°F or greater, but these are the first maps that slice it into 10°F segments.