How the world has warmed over the past half-century

Of the nearly 9,200 latitude-longitude combinations for which I had usable data, the average temperature increased in January for nearly 7,800, or about 85 percent. The average increase was about 1.5 degrees Celsius, or about 2.7 degrees Fahrenheit. In July, just over 6,600 locations saw increased temperatures, or 72 percent. The average increase was about half as large as in January.