Philadelphia (PA) Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Philadelphia, Pennsylvania, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages. Let's now guide you through the details for a complete overview.
Philadelphia has a relatively rain/snowy climate with high precipitation levels, averaging 1272 mm (50 in) of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Philadelphia experiences moderate seasonal variation in rainfall, with monthly averages ranging from 132 mm (5.2 in) in August, the wettest month, and 78 mm (3.1 in) in November, the driest month.
August, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 260 hours of sunshine in this period. During the driest month November you can expect a temperature of 13°C (55°F). For more detailed insights into the city's temperatures, visit our Philadelphia Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Philadelphia's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Philadelphia spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in the United States of America: City Comparison
The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.
heavy rainfall
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moderate
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Philadelphia vs World: Rainfall Compared
Philadelphia's average annual precipitation is 1272 mm (50 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Philadelphia (PA)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Philadelphia (PA) Climate page.
