This harsh winter may have come as a surprise to people accustomed to hearing that the world is warming. Temperatures were below average across most of the contiguous United States in February, and on opposite ends of the spectrum in January, with the western and eastern U.S. experiencing extreme highs and lows, respectively. Meanwhile, the world as a whole endured the fourth warmest January and 21st warmest February on record, according to NASA and NOAA temperature analyses. Scientists say the temperature patterns observed this winter are a great example of the difference between weather and climate. As climate change causes the planet to warm, localized variations in temperature due to weather may still occur. Watch the video to see how temperatures in the U.S. compared to the rest of the world in January 2014.