Overview: PhiladelphiaPhiladelphia (United States of America) is a place with a mild continental climate. Temperatures during the day are in the range from 4 °C (39 °F) in January to 30 °C (86 °F) in July. The highest night temperatures could be experienced in July with 19 °C (66 °F), the lowest in January with -4 °C (24 °F). The least rainy month in Philadelphia is October with its 8 days of rain, the rainiest month is May, when it rains 11 days.