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Posted at 3:15 PM ET, 07/30/2010

PM Update: Some payback for all the heat

By Ian Livingston

Weekend half good and half iffy

* Weather with attitude? | Record snow not due to global warming *
* Outside now? Radar, lightning, temps & more: Weather Wall *

After all the heat we've gone through recently, I think we deserve more days like this one. Just a few clouds are floating by in an otherwise blue sky. High temperatures generally in the mid-80s are actually a few degrees below average in most spots, and humidity levels are delightful. This time yesterday we were still sitting in low 70s dew points. Today they have fallen about 20 degrees -- enough to not even think about a "stickiness factor" (unless reading this).

Temperatures: Latest D.C. area temperature map powered by iMapWeather (base map by Google). Click and hold on map to pan. Double-click to zoom. Refresh page to update. See larger map on our Weather Wall.

Through Tonight: Awesome! This is almost like an early-fall preview here as evening readings drop into and through the 70s near sunset. Overnight lows range from near 60 in the coolest spots to around 70 in the warmest. If National Airport dips into the 60s, which is certainly possible, it will be the first time since the last meaningful cool down at the end of June and beginning of July.

Tomorrow (Saturday): Get your favorite outdoor weekend activities in tomorrow if you can since Sunday looks a bit iffy. Overall, it should be fairly similar to today but perhaps a touch warmer and with more clouds infiltrating the area late. Mostly-or-partly sunny skies during a good chunk of the day should promote highs rising to the mid-and-upper 80s. Thicker clouds and any rain shot should hold off till after sunset or during the overnight.

See Camden Walker's forecast through next week. And if you haven't already, join us on Facebook and follow us on Twitter.

Record watch: As of yesterday, D.C.'s July temperature average was 83.4. The monthly record target is 83.1 (1993). We're still in the running for the July record, but today's high temperatures are lagging a bit, so #2 (83.0) or #3 (>82.6) appear more likely when factoring in tomorrow's expected temperatures. Either way, the June-July period will end up the warmest on record in D.C. and we are looking at the need for August to be cooler than normal to keep us from breaking the summmer (June-Aug) heat record set back in 1980. Our last cooler than normal month was February 2010.

By Ian Livingston  | July 30, 2010; 3:15 PM ET
Categories:  Forecasts  
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Next: NatCast: Feeling good for the Phillies

Comments

We can all enjoy another commute from work without being drenched in sweat. Feels like a win, right? :)

Posted by: Camden-CapitalWeatherGang | July 30, 2010 4:22 PM | Report abuse

Ian, by the way, I really liked your Cleveland Park photo you contributed to my post this morning! nice puddle-lake shot!

Posted by: Camden-CapitalWeatherGang | July 30, 2010 4:34 PM | Report abuse

I have to agree that Ian's shot of the puddle was most excellent. The autumn-like colors really stand out and deliver quite the image.
On another note... how does one come up with the average temperature for any given day, and then factor that in to the running monthly total? I assume it is not as simple as taking the high and low and coming up with the median?

Thanks

Posted by: pjdunn1 | July 30, 2010 6:15 PM | Report abuse

Thanks for the kind words.

pjdunn1, re: the average.. it is pretty simple. Just high+low/2. For the mo just add up all the day avgs and divide by # of days.

Posted by: Ian-CapitalWeatherGang | July 30, 2010 9:47 PM | Report abuse

Interesting... so if it's 90 degrees all day and then a cold front comes through and knocks the temp down to 70 at 10pm, then the daily average is 80... which would be wrong... I guess it's close enough generally though

Posted by: spgass1 | July 30, 2010 10:50 PM | Report abuse

Just got back from Denver/Colorado and delighted to find this incredibly lovely cool air. I'm here to say that 95 with no humidity and NO SHADE is not as comfortable as one would think. Although many mornings were absolutely wonderful, cool and dry ... but not for long. Humidity, in moderation, has its strong points ....

Posted by: weathergrrl | July 30, 2010 11:03 PM | Report abuse

The comments to this entry are closed.

 
 
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