Coming Soon: Fewer 'Perfect' Days

January 25, 2017 02:35 AM
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There is such a thing as a perfect day, and here is how NOAA scientists describe it: temperatures between 18 and 30 degrees Celsius, less than a centimeter of rain, and low humidity. But, don't get used to those days. In a new study, NOAA says they're becoming less common. VOA's Kevin Enochs reports.