Valentines Day used to be a warm day in the US, but temperatures have declined and the frequency of warm weather has dropped off sharply over the past century.
The two warmest Valentines Days were 1921 and 1954, with temperatures into the 60s and 70s well into the northern states.
via The Deplorable Climate Science Blog
February 14, 2018 at 05:39AM
Iowa Climate Science Education 