Record high temperatures are occurring more than twice as often as record lows.
According to a new study, between Jan. 1, 2000 and Sept. 30, this year the continental United States set 291,237 record highs and 142,420 record lows at various locations.
"Climate change is making itself felt in terms of day-to-day weather in the United States," said Gerald Meehl, a researcher at the National Center for Atmospheric Research and the lead author of the study.
In addition to NCAR, the research was done by scientists at the Weather Channel and National Oceanic and Atmospheric Administration. It is being published in Geophysical Research Letters.