2012 was US's hottest year on record

Last year was the warmest on record for the contiguous United States, say NOAA scientists, with an average temperature of 55.3°F - 3.2°F above the 20th century average, and 1.0°F above 1998, the previous warmest year.

Why does it rain more near airports?

Areas around airports experience more rain and snow, say researchers, as planes trigger precipitation by flying through clouds.