Evening update: BWI did end up tying a previous record high set in 2002 of 90 degrees. National and Dulles both fell short of records, with highs of 89 and 88 respectively.

4:40 p.m.: Welcome to summer, or at least a bit lower humidity version of it. Temperatures in the upper 80s to near 90 this afternoon are a good 15 degrees, or more, above normal for the date, and we’ve come pretty close to record highs. We’ll have to wait on official numbers, particularly at BWI, where a reading of at least 89 has been recorded and the record is 90. We cool back down tomorrow. However, when I say cool, I mean not quite so summerlike.

Through Tonight: It’s a warm night with temperatures slowly dipping into the 70s this evening on their way to lows in the mid-to-upper 50s in the suburbs and low 60s downtown. A few clouds may stream by as a cold front moves through late.

Tomorrow (Tuesday): It’s a pretty fine day and also a little cooler than today. Temperatures are still above average though, with highs in the mid-and-upper 70s. A northwest breeze may be pretty stiff in the afternoon, blowing around 10-20 mph with higher gusts. Skies are partly cloudy.

See Jason Samenow’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter . For related traffic news, check out Dr. Gridlock.

Northeast heat: It’s been a hot one across the entire northeast today with records falling particularly in New England. News from Boston indicates that numerous runners have become ill during the marathon, thanks to temperatures in the 80s this afternoon. Boston has at least tied its previous record high of 84, while Hartford, Connecticut has set a new one with a 92-degree reading!

Pollen update: Trees HIGH at 1227 grains/cubic meter - warm, dry weather causing spike (was 158 Fri). Grass MODERATE.