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Daryl Ritchison, WDAY, Published November 20 2013

Weather Talk: It’s that time of year again for first below-zero temps

This is usually the time of year that we record the first below-zero low temperatures of the season. It is also no coincidence that this is also the time of year when we often get our first snowfalls of 1 inch or greater.

Like most other climate statistics, the first below-zero reading varies greatly from year to year. The earliest below-zero low temperature occurred on Oct. 26, 1919, when the low dropped to -4 degrees. The latest first negative of the season was in 1987 when our first negative temperature did not occur until Dec. 31.

The average date is sandwiched in between those two extremes on Nov. 28. The average last below-zero day in spring is on March 11. The overall average number of days below zero during our cold season is 48, with 10 of those days recording both a negative high and low.

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