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Posted at 9:20 AM ET, 07/ 7/2009

Forecast: First-Class July Weather

By Matt Rogers

Low humidity the top perk, but heat this weekend?

* UnitedCast | June Recap | Later: An Amazing Fireworks Show *


Today: Partly cloudy. 83-87. Tonight: Partly cloudy. 59-64. | Tomorrow: Partly cloudy, a little cooler. 81-85. | A Look Ahead


Wow, here we are marching into the heart of July with temperatures refusing to breach 90 and dew points almost as low as they can go this time of year (comfortable 50s and 60s). Yesterday afternoon, Ian Livingston mentioned the developing El Niño pattern (citing a Reuters article). For the D.C. area, a developing El Niño tends to equate with relatively cool and wet summers. And so far, that appears to be the case. While we cannot rule out some brief heat spikes (like maybe one this Saturday), the summer continues to be quite pleasant overall.

Temperatures: Current area temperatures. Powered by Weather Bonk. Map by Google. Hover over and click icons for more info. Click and hold on map to pan. Refresh page to update. See map bigger on our Weather Wall.

Today (Tuesday): Mixture of clouds and sun today will keep things less sunny than Monday; but,we can still expect very pleasant temperatures in the middle 80s with low humidity. Light west winds are expected and there is the very slight, slight chance of an isolated shower out there (less than 30%) late this afternoon, especially north of town. Confidence: Medium-High

Tonight: Partly cloudy skies should prevail. Those low humidity levels should allow temperatures to drop back into the 60s in the city and probably upper 50s in the outer suburbs again. Winds should shift to coming from a northerly direction. Confidence: Medium-High

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday): The overnight wind shift should set the stage for a slightly cooler Wednesday with low-to-mid 80s for highs and still partly cloudy skies. Dew points should remain low and again there is an outside chance of an isolated shower or thunderstorm (less than 30%). Confidence: Medium-High

Tomorrow Night: Clouds will be around and lows should drop into the upper 50s to low 60s (warmest in the city). Calm winds or light breezes from the north should be expected again. Confidence: Medium


Thursday could be the coolest day of the week due to more clouds and a prevailing wind flow from the north or northeast. This could also mean more showers (40% chance) or even a thunderstorm. Look for a high temperature range in the upper 70s to low 80s. Confidence: Medium

Friday inches warmer, but we cannot escape that continued 40% chance for showers and possible thunderstorms under partly cloudy skies. Temperatures should return to the middle 80s for highs and look for morning lows again in the upper 50s to low 60s. Confidence: Low-Medium

The weekend could feature a quick burst of stronger heat especially on Saturday as another big cold front approaches the region and forces some heat out ahead of it. We could see upper 80s or even low 90s with slightly higher humidity. Sunday should take a step back with mid-to-upper 80s more likely. Lows should mainly be in the 60s. There will be a 40% chance of thunderstorms both days. So there might be a stronger touch of summer this weekend, but there are no signs it will persist if we get it. Confidence: Low

By Matt Rogers  | July 7, 2009; 9:20 AM ET
Categories:  Forecasts  
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Looks like the range of 83-87 may have been a little pessimistic:
National, Dulles, and BWI all at 87 for multiple observations.

Posted by: CapitalClimate | July 7, 2009 3:06 PM | Report abuse

What happened to the link to the weather and traffic at the top of the WaPo home page? I see no CWG link any more.


Posted by: alrob8 | July 7, 2009 3:15 PM | Report abuse


If you're logged in and reside locally, the link to CWG should still be on the home page. There may have been a technical issue that temporarily displayed a different version of the home page earlier, but the version with the CWG link seems to be restored.

Posted by: CapitalWeatherGang | July 7, 2009 4:00 PM | Report abuse

The highs:
National 88
Dulles 89
BWI 88
Still on track for near-record cool, however.

Posted by: CapitalClimate | July 7, 2009 6:47 PM | Report abuse

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