We woke up this morning to frigid -17°C air (with sun though!), with an official overnight low of -19°C at O'Hare. We get cold like this almost every year; in fact, it got down to -23°C just 371 days ago.
No, the record low temperature for this day was also the coldest temperature ever recorded in Chicago, on Sunday 20 January 1985: -32°C. It was so cold that morning that my high school cancelled classes the next day—the only time they did so in my four years there.
Chicago historian John R Schmidt also remembers:
The winters had been getting colder in Chicago. The previous record low temperature had been -31°C, posted only three years ago. A new Ice Age seemed to be on the way. Both Time and Newsweek had predicted it in cover-stories.
Some experts claimed that Chicago temperatures weren’t really setting records. In 1970 the city’s official weather station had been moved from Midway to O’Hare. Everyone knew that the readings were usually a few degrees lower at O’Hare.
The day moved on. By noon the mercury had climbed to -27°C. Now more people were venturing out. A young man on State Street was heading for a movie. “I got tired of staying in,” he said. “What can you do except watch reruns on television?”
Remember, kids: this was five years before Tim Berners Lee invented the World Wide Web and 16 years before the current century. We had to read books, or in my case, study for final exams.
More relevantly, though, is what happened to the predicted ice age. Going by astronomical cycles that have governed Earth's climate for millions of years, we should be moving into a cooler period, and indeed temperatures have declined overall since about 4000 YBP. Yet since around 1800, global average temperatures have instead gone up, increasing even more rapidly in the last 40 years than in any other time than we have detected in the million-year ice record.
There is no guarantee that Chicago will never experience a colder temperature than we did 40 years ago today. But with the OAFPOTUS bringing his kakistocratic, climate-denying clown car back into power in just two hours, we will probably break more heat records than cold records.
I hope we live long enough to see.