Sullivan County, PA Climate

Sullivan County, PA has a humid continental climate. Summers are generally warm and humid, with temperatures reaching into the 80s on average. Winters are cold and snowy, with an average temperature around 25°F and snowfall averaging around 50 inches. The area is also known for its thunderstorms during the summer months, often bringing heavy rain and flooding when they occur. Fall brings pleasant temperatures in the 50s and 60s, along with an abundance of colorful foliage. Spring can be quite unpredictable, with temperatures ranging from the 30s to the 70s before finally settling into the summer months.

Sullivan County, Pennsylvania gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Sullivan County averages 45 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 177 sunny days per year in Sullivan County. The US average is 205 sunny days.

Sullivan County gets some kind of precipitation, on average, 147 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 79 degrees
Winter Low: the January low is 14
Rain: averages 45 inches of rain a year
Snow: averages 45 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Sullivan County is 6.5 (10=best), which means it is less comfortable than most places in Pennsylvania.

9 Summer - 4.2 Winter

July, August and June are the most pleasant months in Sullivan County, while January and February are the least comfortable months.

Climate	Sullivan, Pennsylvania	United States
	Unlock	38.1 in.
	45.2 in.	Unlock
	Unlock	106.2 days
	177 days	Unlock
	78.9°	85.8°
	Unlock	21.7°
	6.5	Unlock
	Unlock	4.3
	1775 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 Sullivan County with an average high temperature of 78.9°, which ranks it as one of the coolest places in Pennsylvania. In Sullivan County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sullivan County are August, July and June.

In Sullivan County, there are 1.7 days annually when the high temperature is over 90°, which is one of the coolest places in Pennsylvania.

January has the coldest nighttime temperatures for Sullivan County with an average of 14.3°. This is one of the coldest places in Pennsylvania.

In Sullivan County, there are 154.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Pennsylvania.

In Sullivan County, there are 7.5 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Pennsylvania.

Humidity in Sullivan County is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.

September is the wettest month in Sullivan County with 4.4 inches of rain, and the driest month is February with 2.5 inches. The wettest season is Autumn with 28% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 44.5 inches in Sullivan County means that it is wetter than most places in Pennsylvania.

January is the rainiest month in Sullivan County with 14.0 days of rain, and September is the driest month with only 10.7 rainy days. There are 147.1 rainy days annually in Sullivan County, which is rainier than most places in Pennsylvania. The rainiest season is Summer when it rains 26% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 45.2 inches in Sullivan County means that it is snowier than most places in Pennsylvania. January is the snowiest month in Sullivan County with 12.0 inches of snow, and 6 months of the year have significant snowfall.

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