• Could the record-setting temperatures of the late 1800s be due to the thermometers back then?

    10 days ago - By WGN TV

    Dear Tom,
    Is there reason to think the large number of record-setting temperatures dating from the late 1800s and early 1900s in Chicago was because the thermometers back then may not have been as accurate as today?
    - Gary Hall, Crete
    Dear Gary,
    Definitely not! In fact, thermometers in use then provided more accurate readings than the temperature-measuring equipment in use today. However, the instrument shelter used then - a wooden louvered box set about 5 feet high - could warm as much as a few degrees above existing air temperatures in sunny, light-wind conditions.
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