October is a good time to visit Philadelphia, Pennsylvania as the summer heat is gone and the winter cold has not yet arrived. The autumn colors usually peak here from mid-October to early November and the weather is ideal for most outdoor activities.
Early in the month, the afternoon temperatures are very pleasant, averaging in the lower 70s f (22-23C) with overnight lows in the mid to upper 50s f (about 14C). A couple of days early in the month could even see temperatures into the lower 80s f (about 27-28C). As the month progresses, daytime high temperatures will fall into the low to mid 60s f (17-18C) with overnight lows in the mid to upper 40s f (8-9C).
What to wear in Philadelphia during October?
October can range from mild to chilly here so a few sweaters or a light to medium weight jacket would be advisable for those chilly days or nights.
Skies will be clear or partly sunny on about 19-20 days with 11-12 days being mostly overcast. Rain can be expected on about 8 days this month, however, significant rainfalls of 0.5 inch (about 13mm) or more occur, on average, on about 2 days.