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Posted at 11:00 AM ET, 07/26/2010

Baltimore making 100-degree history

By Jason Samenow

90-degree days mounting towards historic levels in D.C.

* Heat takes a short break: Full Forecast | Storm aftermath: Post Local *

As we mentioned, Baltimore Washington International (BWI) airport hit 100 yesterday - breaking the previous record of 99 from 1934. But more notable is the fact it reached 100 for the fifth time this month - the most ever 100-degree occurrences for any month in Baltimore in recorded history. Not only that, yesterday marked Baltimore's seventh 100 degree or higher day in 2010 - tying 1988 and 1930 for the most ever in a summer. And we've still got all of August.

Here in Washington, at Reagan National (DCA), we've now had 42 90+ degree days. This puts us even with 1994 for the the highest number of such days in a year through July 25. The most 90 degree days in a calendar year is 67 in 1980 - meaning we've still got a ways to go...

Hat tip: National Weather Service Forecast Office in Sterling

By Jason Samenow  | July 26, 2010; 11:00 AM ET
Categories:  Local Climate  
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Here's a comparo of DC and Baltimore 100+ days by yr going backwards through history.

Posted by: Ian-CapitalWeatherGang | July 26, 2010 11:18 AM | Report abuse

The hottest year for such days in D.C. appears to be 1930 with 11.

In Wisconsin, the Dust Bowl years, 1934 and 1936 were the hottest--it reached 107 in Eau Claire in May, 1934, 105 in June, 1934 and 111 in July, 1936. Other hot summers occurred in 1947, 1955 and 1988, I remember 1955 vividly and was on vacation in Eau Claire the day it hit 104 in 1988. A few days later I heard that the same temperature, 104, was recorded the next day at Reagan National.

Posted by: Bombo47jea | July 26, 2010 1:43 PM | Report abuse

Longer range signals out to day 10 or 14 look cooler than they've been for some time. Some 90s intermixed but no intense heat looks to be setting up right away. Once we get past the next week or two we'll be able to start talking about "running out of time" for giant heat, which is a good thing I guess!

Posted by: Ian-CapitalWeatherGang | July 26, 2010 3:14 PM | Report abuse

Great bar chart, Ian; snow records are much more fun. Hopefully soon you'll be able to plot the number of 20-inch-plus snowfalls at IAD, Baltimore, the old Washington weather bureau and, most importantly, but still not yet, DCA. ; ))

Posted by: JerryFloyd1 | July 26, 2010 4:47 PM | Report abuse

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