The Brief Philadelphia will enjoy its first real dose of Fall on Thursday as temperatures barely cracked 70 degrees. A perfect early Fall weekend is ahead for Philadelphia with sunny skies and highs in the low 80s. The next chance of rain in Philadelphia isn't until next Wednesday. A perfect Fall weekend is ahead for the Philadelphia area, with plenty of sunshine and temperatures in the low 80s on both Saturday and Sunday. A nearly identical weather day is expected on Friday, but forecasters expect high temperatures over the weekend to take a meaningful jump.