Jefferson County, IN Climate

Jefferson County, IN has a humid continental climate with warm summers and cold winters. The summer's average temperature is around 73 degrees Fahrenheit while the winter's average temperature hovers around 33 degrees Fahrenheit. Rainfall in the area is plentiful and distributed evenly throughout the year. Snowfall is moderate compared to other areas, measuring about 21 inches annually. The area also experiences some severe weather events such as thunderstorms and occasional tornadoes during the late spring and early summer months.

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

Jefferson County averages 13 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 190 sunny days per year in Jefferson County. The US average is 205 sunny days.

Jefferson County gets some kind of precipitation, on average, 102 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 86 degrees
Winter Low: the January low is 22
Rain: averages 47 inches of rain a year
Snow: averages 13 inches of snow a year

Bestplaces Comfort Index

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

8.3 Summer - 5.5 Winter

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

Climate	Jefferson, Indiana	United States
	47.0 in.	38.1 in.
	13.2 in.	27.8 in.
	101.8 days	106.2 days
	190 days	205 days
	85.8°	85.8°
	21.5°	21.7°
	7.3	7
	4	4.3
	736 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 85.8°, which ranks it as warmer than most places in Indiana. In Jefferson County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Jefferson County are September, May and June.

In Jefferson County, there are 20.2 days annually when the high temperature is over 90°, which is hotter than most places in Indiana.

January has the coldest nighttime temperatures for Jefferson County with an average of 21.5°. This is warmer than most places in Indiana.

In Jefferson County, there are 110.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Indiana.

In Jefferson County, there are 2.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Indiana.

The humidity is usually acceptable 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. July, August and June are the three most uncomfortably humid months in Jefferson County.

May is the wettest month in Jefferson County with 5.3 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Summer with 29% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 47.0 inches in Jefferson County means that it is one of the wettest places in Indiana.

May is the rainiest month in Jefferson County with 11.1 days of rain, and September is the driest month with only 6.4 rainy days. There are 101.8 rainy days annually in Jefferson County, which is one of the least rainy places in Indiana. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 13.2 inches in Jefferson County means that it is less snowy than most places in Indiana. January is the snowiest month in Jefferson County with 4.1 inches of snow, and 4 months of the year have significant snowfall.

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