Vernon, IL Climate


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United States / Illinois / Centralia Metro Area / Marion County / Vernon / Zip Codes
Vernon, IL has a humid continental climate with warm summers and cold winters. The average annual temperature ranges from 32 to 57 degrees Fahrenheit. During the summer months, temperatures typically reach into the mid-80s while winter averages dip into the low-20s. Precipitation is spread fairly evenly throughout the year with an average of 43 inches of rain and 8 inches of snow each season. There is plenty of sunshine in Vernon, IL with an average of 2,400 hours per year.

Vernon, Illinois gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Vernon averages 10 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Vernon. The US average is 205 sunny days.

Vernon gets some kind of precipitation, on average, 97 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 88 degrees
Winter Low: the January low is 21
Rain: averages 42 inches of rain a year
Snow: averages 10 inches of snow a year

Bestplaces Comfort Index

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

7.9 Summer - 5.5 Winter
September, May and June are the most pleasant months in Vernon, while January and December are the least comfortable months.

  ClimateVernon, IllinoisUnited States
  41.8 in.38.1 in.
  10.4 in.27.8 in.
  96.6 days106.2 days
  199 days205 days
  87.6°85.8°
  21.0°21.7°
  7.27
  4.34.3
  515 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 Vernon with an average high temperature of 87.6°, which ranks it as warmer than most places in Illinois. In Vernon, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Vernon are September, May and June.
In Vernon, there are 28.7 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.
January has the coldest nighttime temperatures for Vernon with an average of 21.0°. This is warmer than most places in Illinois.
In Vernon, there are 101.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.
In Vernon, there are 2.9 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 Vernon 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 Vernon.
May is the wettest month in Vernon with 5.3 inches of rain, and the driest month is January with 2.6 inches. The wettest season is Summer with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 41.8 inches in Vernon means that it is wetter than most places in Illinois.
May is the rainiest month in Vernon with 10.8 days of rain, and September is the driest month with only 6.2 rainy days. There are 96.6 rainy days annually in Vernon, which is less rainy 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 22% chance of a rainy day.
An annual snowfall of 10.4 inches in Vernon means that it is one of the least snowy places in Illinois. January is the snowiest month in Vernon with 3.4 inches of snow, and 4 months of the year have significant snowfall.
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