Jefferson County, OH Climate

The climate in Jefferson, OH County is classified as a humid continental climate. Summers are hot and humid with temperatures ranging from the mid-80s to upper 90s; while winters can be cold, with temperatures falling into the 20s and occasionally below zero. Precipitation is ample throughout the year, receiving between 28 to 35 inches of rain per year. Snowfall also occurs typically from November to April, depending on the year. The combination of warm summers and cold winters makes for extreme weather changes and a wide variety of precipitation patterns.

Jefferson County, Ohio gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Jefferson County averages 26 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 163 sunny days per year in Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 145 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 82 degrees
Winter Low: the January low is 20
Rain: averages 40 inches of rain a year
Snow: averages 26 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Jefferson County is 7.0 (10=best), which means it is about average compared to other places in Ohio.

9 Summer - 4.8 Winter

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

Climate	Jefferson, Ohio	United States
	39.7 in.	38.1 in.
	25.5 in.	27.8 in.
	144.5 days	106.2 days
	163 days	205 days
	82.4°	85.8°
	20.2°	21.7°
	7	7
	3.5	4.3
	1071 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 82.4°, which ranks it as cooler than most places in Ohio. In Jefferson County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are June, September and August.

In Jefferson County, there are 5.9 days annually when the high temperature is over 90°, which is cooler than most places in Ohio.

January has the coldest nighttime temperatures for Jefferson County with an average of 20.2°. This is warmer than most places in Ohio.

In Jefferson County, there are 118.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Ohio.

In Jefferson County, there are 2.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Ohio.

The humidity is usually comfortable in Jefferson 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.

May is the wettest month in Jefferson County with 4.2 inches of rain, and the driest month is February with 2.3 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 39.7 inches in Jefferson County means that it is about average compared to other places in Ohio.

December is the rainiest month in Jefferson County with 14.3 days of rain, and September is the driest month with only 9.2 rainy days. There are 144.5 rainy days annually in Jefferson County, which is rainier than most places in Ohio. 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 25.5 inches in Jefferson County means that it is snowier than most places in Ohio. January is the snowiest month in Jefferson County with 7.7 inches of snow, and 6 months of the year have significant snowfall.

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