Harrison, IL Climate


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United States / Illinois / Carbondale-Marion Metro Area / Jackson County / Harrison / Zip Codes
Harrison CDP, IL has a humid continental climate, which is characterized by cold winters and hot summers. The average temperature during the summer months can reach up to 85 degrees Fahrenheit, while temperatures dip to an average of 28 degrees Fahrenheit in the winter. Precipitation levels are relatively consistent throughout the year and range from 4-5 inches per month on average. Overall, the climate in Harrison CDP, IL is fairly mild compared to other areas of Illinois due to its lower elevation and proximity to Lake Michigan.

Harrison, Illinois gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Harrison averages 9 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 213 sunny days per year in Harrison. The US average is 205 sunny days.

Harrison 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 89 degrees
Winter Low: the January low is 24
Rain: averages 46 inches of rain a year
Snow: averages 9 inches of snow a year

Bestplaces Comfort Index

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

7.4 Summer - 5.8 Winter
September, May and October are the most pleasant months in Harrison CDP, while January and December are the least comfortable months.

  ClimateHarrison, IllinoisUnited States
    Unlock38.1 in.
  9.3 in.  Unlock
    Unlock106.2 days
  213 days  Unlock
  88.6°85.8°
    Unlock21.7°
  7.3  Unlock
    Unlock4.3
  407 ft.  Unlock
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 Harrison CDP with an average high temperature of 88.6°, which ranks it as one of the hottest places in Illinois. In Harrison CDP, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Harrison CDP are May, September and June.
In Harrison CDP, there are 35.0 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.
January has the coldest nighttime temperatures for Harrison CDP with an average of 23.8°. This is one of the warmest places in Illinois.
In Harrison CDP, there are 94.2 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.
In Harrison CDP, there are 1.4 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.
The humidity can be uncomfortably heavy or close in Harrison CDP 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 Harrison CDP.
May is the wettest month in Harrison CDP with 5.2 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 30% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 45.6 inches in Harrison CDP means that it is one of the wettest places in Illinois.
May is the rainiest month in Harrison CDP with 10.6 days of rain, and September is the driest month with only 6.3 rainy days. There are 97.1 rainy days annually in Harrison CDP, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 31% of the time and the driest is Autumn with only a 22% chance of a rainy day.
An annual snowfall of 9.3 inches in Harrison CDP means that it is one of the least snowy places in Illinois. January is the snowiest month in Harrison CDP with 2.8 inches of snow, and 4 months of the year have significant snowfall.
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