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DC weather history for December 17

A relatively modest 65-degree record high—set in 2021 and tied in 2024—stands as December’s lowest daily record, making it one of the easiest marks to break during mild spells.

And on this day in 2021 and 2024, the temperature climbed to a calendar day record of 65 degrees. That record high is the lowest of any December date. Most record highs during the month are in the 70s.

The record high that day was one of numerous abnormally mild days in Dec. 2021, which ranked as the fourth-warmest December on record.

As December’s lowest record high, it’s the easiest to break under the right conditions. 

Here are other notables for this day:

Dec 16 Full calendar Dec 18
Jason Samenow

Jason Samenow

Chief meteorologist, journalist, and Capital Weather founder. AMS Certified Digital Meteorologist and D.C.-area native.

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