The Boston Marathon takes place every year on the third Monday in April. The average daytime high temperature in April has been warming rapidly in recent decades, making uncomfortable race days more likely.
Near-record warmth across the U.S. this past winter raised the odds for a warmer than average spring. Even so, several places received plenty of snow, which raised the risk of flooding in the Northern Rockies, the Northern Plains, and New England.
2016 was the third year in a row that global average surface temperature set a new record, and the fifth time the record has been broken since the start of the twenty-first century. This animation shows the yearly history of Earth's temperature since the modern record began in 1880.
Although surface melt did not set a new record in 2016, the Greenland Ice Sheet did continue a long-term trend of decreasing mass, according to the latest Arctic Report Card from NOAA and its partners.