Lerna, IL Climate


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United States / Illinois / Charleston-Mattoon Metro Area / Coles County / Lerna / Zip Codes
Lerna, IL has a humid continental climate featuring cold winters and hot, humid summers. Average winter temperatures range from the mid-20's to the mid-30's Fahrenheit while summer temperatures range from the upper 70's to the lower 80's Fahrenheit. Precipitation is evenly distributed throughout the year with up to 30 inches of snow in the winter months and up to 4 inches of rainfall in the summer months. The area is also prone to thunderstorms and tornadoes during certain times of the year.

Lerna, Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Lerna averages 16 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 201 sunny days per year in Lerna. The US average is 205 sunny days.

Lerna gets some kind of precipitation, on average, 112 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 20
Rain: averages 40 inches of rain a year
Snow: averages 16 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Lerna is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

8.2 Summer - 5.3 Winter
September, May and June are the most pleasant months in Lerna, while January and December are the least comfortable months.

  ClimateLerna, IllinoisUnited States
  40.2 in.38.1 in.
  15.8 in.27.8 in.
  111.8 days106.2 days
  201 days205 days
  86.2°85.8°
  20.2°21.7°
  7.27
  4.14.3
  755 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 Lerna with an average high temperature of 86.2°, which ranks it as warmer than most places in Illinois. In Lerna, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Lerna are September, May and June.
In Lerna, there are 20.5 days annually when the high temperature is over 90°, which is about average compared to other places in Illinois.
January has the coldest nighttime temperatures for Lerna with an average of 20.2°. This is warmer than most places in Illinois.
In Lerna, there are 103.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.
In Lerna, there are 3.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.
The humidity can be uncomfortably heavy or close in Lerna during the summer months. July is the most humid month, though humidity is low for most of the year. July, August and June are the three most humid months in Lerna.
May is the wettest month in Lerna with 4.4 inches of rain, and the driest month is February with 2.1 inches. The wettest season is Autumn with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 40.2 inches in Lerna means that it is wetter than most places in Illinois.
May is the rainiest month in Lerna with 11.7 days of rain, and September is the driest month with only 7.2 rainy days. There are 111.8 rainy days annually in Lerna, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 23% chance of a rainy day.
An annual snowfall of 15.8 inches in Lerna means that it is less snowy than most places in Illinois. January is the snowiest month in Lerna with 6.0 inches of snow, and 5 months of the year have significant snowfall.
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