King of Prussia (PA) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in King of Prussia. Average daytime temperatures reach a very warm 31°C (88°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 5°C (41°F).

At night, temperatures range from around 19°C (66°F) in July to -5°C (23°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

King of Prussia has a relatively rain/snowy climate with high precipitation levels, averaging 1287 mm (51 in) of rain/snowfall annually. King of Prussia experiences moderate seasonal variation in rainfall, with monthly averages ranging from 143 mm (5.6 in) in August, the wettest month, and 78 mm (3.1 in) in November, the driest month. For more details, please visit our King of Prussia Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

King of Prussia can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 4.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The mean water temperature over the year ranges from 5°C (41°F) in February to 25°C (77°F) in August.

Water temperature over the year

The relative humidity is high throughout the year in King of Prussia.

The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year