An interesting chart showing how the number of record daily high temperatures in the U.S. now far exceeds the number of record daily lows
The chart represents weather data for the contiguous 48 states analyzed by the University Corporation for Atmospheric Research:
If temperatures were not warming, the number of record daily highs and lows being set each year would be approximately even. Instead, for the period from January 1, 2000, to September 30, 2009, the continental United States set 291,237 record highs and 142,420 record lows, as the country experienced unusually mild winter weather and intense summer heat waves.
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