Expats living in Philadelphia will experience hot, humid summers and cold winters. Spring and autumn are the most pleasant seasons weather-wise. Snowfall is variable in Philadelphia but occurs most frequently in January. Precipitation is generally spread throughout the year.

The warm season lasts from May to September with an average daily high of 77°F (25°C). Temperatures can reach 86°F (30°C) in summer, and afternoon thunderstorms are common. The cold season lasts from December to March with daily highs averaging below of 49°F (9°C). Winter temperatures are frequently below freezing and cold spells do occur.