Summer's biggest cooldown begins
The coolest stretch of summer has started.
Fair skies will also dominate over the next six days, with a slight chance of rain on Sunday the only precipitation in the National Weather Service forecast.
There's not even a tropical storm brewing in the Atlantic that might send rain our way for the foreseeable future.
This morning's low of 56 was the lowest temperature at Philadelphia International Airport since late May.
Saturday might barely stay above 60, but Sunday and Monday night are expected to also dip into the 50s -- a series of lows that hasn't been seen early June.
Today's high of 75 is just one degree above the two lowest highs so far this summer, 74s recorded on June 25 and Aug. 1. Monday could also see the mid 70s, with the low 80s the norm until Wednesday, when the mid 80s could return.
The normal range for this time of year is from mid-60s for the low to upper 70s for the high.
A chance of thunderstorms is mentioned for Thursday.
For more on the forecast, go to Philly.com's weather page.
Contact staff writer Peter Mucha at 215-854-4342 or firstname.lastname@example.org.