U.S. Daily Temperature Anomalies 1964-2013 by Enigma

Anomalies (in this context) are defined as days on which either the maximum or minimum temperature recorded on that day fall outside of their expected ranges. Enigma used historical daily measurements of temperature from NOAA to construct several interesting graphics that provide a new way of looking at our changing climate. CLICK HERE to view the page. The map is impressive, but be sure to scroll down and play with the one titled, "Yearly proportion of warm anomalies to cold".