A secondary shot of cool air is pushing southeast through the Northeast today, with the frontal boundary responsible poised to move south through the region during the day. Dewpoints will drop from the upper half of the 50's (which is what we could reach before the front's passage) into the 40's and perhaps even the 30's across the region over the next 24 hours. This zapping of moisture will set us up for a rather cool night around town tonight.
Today will still be pretty nice overall -- it'll be a couple of degrees cooler than yesterday, a bit breezier as well as northwest winds pick up in the midday and afternoon hours. Winds could gust to over 20 mph in spots. Skies will feature a mix of clouds and sun, especially as the front passes through. However, the front will be dry as it pushes southeast.
Highs this afternoon get to around 80 in the city, low 80's south of the city. It will be cooler than that north and northwest of town...probably only getting to around 75 or so in Allentown by day's end.