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Posted at 10:30 AM ET, 07/10/2009

D.C. - A Sweet Spot for This Summer's Weather

By Jason Samenow

* Oppressive Humidity Still a No-Show: Full Forecast *
* Farms Adjust to Wet Weather | El Nino and Hurricanes *

Blissfully perplexed by our recent stretch of sensational summer weather (minimal rain and below average temperatures daily so far in July), a colleague asked me who was paying for it? I responded go north or go south. In the Northeast residents have been soaked and sometimes shivering, and in the South and Southern Plains, they've sweltered.

Boston tied for its 6th coldest June in 138 years of record keeping and New York City had its 8th coldest June since 1869. During the month, the Big Apple had no 90-degree days and 6 days where temperatures did not escape the 60s. Along with the cool weather, New Yorkers suffered from rain rage experiencing its 2nd wettest June on record after logging 20 days with measurable precipitation. The rainy pattern has relaxed some in July, though a freak hailstorm literally buried Yonkers, New York on Tuesday night.

Keep reading to learn about about where it's been hot and whether any of that heat is headed here...

Temperatures (in degrees F) compared to average during June based on preliminary data. Yellows and oranges are above average and greens and blues are below average. Image courtesy NOAA. See bigger.

What about the heat? While Tony Pann at the Baltimore Examiner cherry-picked examples of cold weather to poo-poo global warming, record heat has run rampant from the South into the Southern Plains. CapitalClimate's Steve Scolnik notes 18 all-time June high temperature records were tied or broken in Florida last month and just two days were below average in Miami. Further west, he documents extensive heat records set during June into early July from Georgia to Texas, including an all-time high of 104 in New Orleans. The image to the right shows the broad expanse of the southern heat during June.

As the big heat ridge has bubbled up over the South, its northward progress has been impeded by the conveyor belt of cold fronts blasting through the Northeast, powered by a southward diving jet stream. Though these fronts have moderated by the time they reach us, we've been far enough north to benefit from the cool, dry air they provide and far enough south to avoid a lot of the rain and nasty weather that has plagued the Northeast. (Note this was not the case during parts of early and mid-June, when we experienced some notably cool and wet periods as the jet stream and associated fronts dipped further south - hence June was a wetter and slightly cooler than average month).

The good news (for us) is that the current overall pattern shows indications it may persist for a while. So though an occasional sticky day may pop up along with the chance of occasional storms and showers, solid odds of sweet weather (i.e. generally cooler than average and dry) seem here to stay for a while.

By Jason Samenow  | July 10, 2009; 10:30 AM ET
Categories:  Local Climate  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Forecast: A Warmer & More Humid Weekend
Next: PM Update: Lovely End to Nice Work-Week Weather


All I can say is that this has been one of the most pleasant summers that I've ever seen in DC. Lovely, just lovely. Heck, we haven't turned on our air conditioner more than once or twice.

Posted by: mannewskie | July 10, 2009 1:20 PM | Report abuse

This summer has been way too cool and non-humid. Pools are way too cold! I don't get what's so "pleasant", going out for a walk and being cold isn't.

Posted by: bastings | July 10, 2009 1:30 PM | Report abuse

What a gorgeous week. today feels like September. I hope it doesn't get hot again.

Posted by: jdcr | July 10, 2009 3:13 PM | Report abuse

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