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Weather Talk: How many -20 degree nights is average?

Jan 21, 2020 6:00:00 AM - inforum.com
inforum - How many times in a winter season should we expect temperatures as cold as -20 degrees? Not as many as in the past. During the terribly cold 1880s, the average number of -20 degree nights was around 20 per year. The record is 39 during the winter of 1886-87. By the early 1900s, the average had dropped to around nine per year, where it remained until our climate began to warm in the 1980s...

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