Putnam County, IL Climate

Putnam, IL County is located in the Midwestern United States and experiences a humid continental climate. The region has four distinct seasons with cold winters and warm summers. In the winter months temperatures typically range between 25 and 40 degrees Fahrenheit while summer temperatures can reach up to 90 degrees. High levels of precipitation are common throughout the year as rainfall averages around 36 inches annually. The area also receives a good amount of snowfall during the winter, often totaling up to 18 inches on average. Overall, Putnam, IL County is great place to experience all four seasons.

Putnam County, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Putnam County averages 21 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 192 sunny days per year in Putnam County. The US average is 205 sunny days.

Putnam 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 15
Rain: averages 38 inches of rain a year
Snow: averages 21 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Putnam County is 7.1 (10=best), which means it is more comfortable than most places in Illinois.

8.7 Summer - 4.9 Winter

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

Climate	Putnam, Illinois	United States
	38.0 in.	38.1 in.
	20.9 in.	27.8 in.
	101.5 days	106.2 days
	192 days	205 days
	85.8°	85.8°
	14.9°	21.7°
	7.1	7
	3.6	4.3
	598 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 Putnam County with an average high temperature of 85.8°, which ranks it as about average compared to other places in Illinois. In Putnam County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Putnam County are September, June and May.

In Putnam County, there are 21.5 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for Putnam County with an average of 14.9°. This is colder than most places in Illinois.

In Putnam County, there are 128.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Putnam County, there are 9.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

The humidity is usually comfortable in Putnam 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 Putnam County with 4.4 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 32% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 38.0 inches in Putnam County means that it is drier than most places in Illinois.

May is the rainiest month in Putnam County with 10.7 days of rain, and February is the driest month with only 6.2 rainy days. There are 101.5 rainy days annually in Putnam County, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 21% chance of a rainy day.

An annual snowfall of 20.9 inches in Putnam County means that it is about average compared to other places in Illinois. January is the snowiest month in Putnam County with 6.5 inches of snow, and 6 months of the year have significant snowfall.

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