The Washington Post

D.C. hits 90 for first time in 2014, a few days ahead of schedule

The 3 p.m. temperature at Reagan National Airport – D.C.’s official weather observing station – sprung to 90 degrees – the first occurrence this calendar year.

A few facts pertaining to our history of first 90-degree temperatures:

*  Since 1872, the average date of our first 90-degree reading is May 18 (including reporting locations in the District and at Reagan National); the earliest first 90 occurred March 22, 1907 and the latest first 90 was July 12, 1979.

* Since 2000, the average date of our first 90-degree reading  is May 16, the earliest occurring April 6, 2010 and latest June 24, 2003.

* Last year (2013), we hit 90 for the first time April 10.


2 p.m. temperature analysis shows the average temperature in the region around 89-90 degrees (WeatherBell.com)

Historically, Washington, D.C. averages 36 90+ days per calendar year.  How many 90+ days do we expect this year?  Stay tuned for our summer outlook coming later this month.

Jason is the Washington Post’s weather editor and Capital Weather Gang's chief meteorologist. He earned a master's degree in atmospheric science, and spent 10 years as a climate change science analyst for the U.S. government. He holds the Digital Seal of Approval from the National Weather Association.
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