181-Degree Difference in Months
This one is not a major temperature drop or rise in minutes or hours, but rather a very unique occurrence within a matter of months.
On February 15, 1936, the town of Parshall, N.D. bottomed out at -60 degrees, a new record low for the state. Almost five months later on July 6, the town of Steele, N.D. recorded a new all-time state record high temperature of 121 degrees. This is a temperature range of 181 degrees in North Dakota from February to July in 1936!
South Dakota accomplished a similar feat in the same year around the same dates. McIntosh set a state record low temperature of -58 degrees on February 17. Then on July 5, Gann Valley set a new record high of 120 degrees for the state (this record was equaled in 2006 near Ft. Pierre).
Florida: 4 inches
Milton, Florida, located just to the northeast of Pensacola, recorded 4 inches of snow on March 6, 1954. Image: Snow at the Alabama/Florida border on Feb. 12, 2010 from iWitness Weather contributor ismsan.