Jefferson County, PA Climate

Jefferson, PA County is located in the central part of Pennsylvania and has a humid continental climate with four distinct seasons. Summers are warm and humid, with average high temperatures in the mid to upper 80s. Winters typically have cold weather with average low temperatures in the mid 20s. Precipitation levels are fairly uniform throughout the year, with summer thunderstorms being common place and snowfall occurring most winters. The area is known for its pleasant spring and fall seasons, with comfortable temperatures that make it perfect for outdoor activities.

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

Jefferson County averages 47 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 162 sunny days per year in Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 159 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 81 degrees
Winter Low: the January low is 16
Rain: averages 45 inches of rain a year
Snow: averages 47 inches of snow a year

Bestplaces Comfort Index

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

9 Summer - 4.2 Winter

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

Climate	Jefferson, Pennsylvania	United States
	45.2 in.	38.1 in.
	46.6 in.	27.8 in.
	158.9 days	106.2 days
	162 days	205 days
	80.5°	85.8°
	16.2°	21.7°
	6.5	7
	3.5	4.3
	1569 ft.	2443 ft.

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 Jefferson County with an average high temperature of 80.5°, which ranks it as cooler than most places in Pennsylvania. In Jefferson County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are June, August and July.

In Jefferson County, there are 3.7 days annually when the high temperature is over 90°, which is cooler than most places in Pennsylvania.

January has the coldest nighttime temperatures for Jefferson County with an average of 16.2°. This is colder than most places in Pennsylvania.

In Jefferson County, there are 148.9 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Pennsylvania.

In Jefferson County, there are 6.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Pennsylvania.

Humidity in Jefferson 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.

June is the wettest month in Jefferson County with 4.8 inches of rain, and the driest month is February with 2.6 inches. The wettest season is Autumn with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 45.2 inches in Jefferson County means that it is wetter than most places in Pennsylvania.

January is the rainiest month in Jefferson County with 15.5 days of rain, and August is the driest month with only 10.6 rainy days. There are 158.9 rainy days annually in Jefferson County, which is rainier than most places in Pennsylvania. The rainiest season is Spring when it rains 28% of the time and the driest is Autumn with only a 22% chance of a rainy day.

An annual snowfall of 46.6 inches in Jefferson County means that it is snowier than most places in Pennsylvania. January is the snowiest month in Jefferson County with 13.6 inches of snow, and 6 months of the year have significant snowfall.

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