Philadelphia County, PA Climate

Philadelphia, PA County has a humid subtropical climate, with mild winters and hot summers. Average temperatures range from the high 30s in winter to the mid-80s during the summer. Average annual precipitation is 43.5 inches, with most rain coming between April and September. Snowfall is common during winter months, usually between December and February. Springtime brings warmer weather and flowers blooming throughout the city, while autumn provides pleasant temperatures for outdoor activities.

Philadelphia County, Pennsylvania gets 47 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Philadelphia County averages 14 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 205 sunny days per year in Philadelphia County. The US average is 205 sunny days.

Philadelphia County gets some kind of precipitation, on average, 119 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 26
Rain: averages 47 inches of rain a year
Snow: averages 14 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Philadelphia County is 7.3 (10=best), which means it is one of the most pleasant places in Pennsylvania.

8.2 Summer - 5.8 Winter

September, June and May are the most pleasant months in Philadelphia County, while January and February are the least comfortable months.

Climate	Philadelphia, Pennsylvania	United States
	Unlock	38.1 in.
	13.6 in.	Unlock
	Unlock	106.2 days
	205 days	Unlock
	87.0°	85.8°
	Unlock	21.7°
	7.3	Unlock
	Unlock	4.3
	111 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Philadelphia County with an average high temperature of 87.0°, which ranks it as one of the hottest places in Pennsylvania. In Philadelphia County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Philadelphia County are September, May and June.

In Philadelphia County, there are 25.4 days annually when the high temperature is over 90°, which is one of the hottest places in Pennsylvania.

January has the coldest nighttime temperatures for Philadelphia County with an average of 26.1°. This is one of the warmest places in Pennsylvania.

In Philadelphia County, there are 76.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Pennsylvania.

In Philadelphia County, there are 0.2 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Pennsylvania.

The humidity is usually comfortable in Philadelphia County but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.

July is the wettest month in Philadelphia County with 4.7 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Autumn with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 47.1 inches in Philadelphia County means that it is wetter than most places in Pennsylvania.

April is the rainiest month in Philadelphia County with 11.7 days of rain, and September is the driest month with only 8.5 rainy days. There are 118.7 rainy days annually in Philadelphia County, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 13.6 inches in Philadelphia County means that it is one of the least snowy places in Pennsylvania. February is the snowiest month in Philadelphia County with 5.0 inches of snow, and 4 months of the year have significant snowfall.

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