The average global temperature for July 2012 was more than 1Fahrenheit above the 20th-century average, making it the fourth warmest July since record keeping began in 1880.
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A new statistical analysis by NASA scientists has found that Earth's land areas have become much more likely to experience an extreme summer heat wave than they were in the middle of the 20th century.
According to the latest statistics from NOAA's National Climatic Data Center, the average temperature for the contiguous United States during July was 77.6F, which is 3.3F above the 20th-century average.