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Philadelphia Weather

Philadelphia weather in September is a kaleidoscope of color. It is simply beautiful! The trees are beginning to put on their display and the air turns to a refreshingly sunny coolness.

The month is characterized by rapidly falling daily high temperatures, with daily highs decreasing from 82°F to 71°F over the course of the month, exceeding 89°F or dropping below 62°F only one day in ten. During the conference time [September 10-11-12], the average daily high temperature is expected to be 79°F, and the low temperature will likely fall to 60°F. You might want to bring a jacket with you for the evenings. It’s best not to be cold as you run up the steps of the Art Museum – Rocky Style!

Philadelphia’s Weather Averages

AVG

AUG

SEP

OCT

HIGH

85.4°F
30.0°C

78.5°F
26.0°C

67.5°F
20.0°C

LOW

65.3°F
19.0°C

58.0°F
14.0°C

46.5°F
8.0°C

RAIN

4.7 in.
12.0 cm.

3.8 in.
10.0 cm.

3.0 in.
8.0 cm.