Johnsburg, IL Climate


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United States / Illinois / Chicago-Naperville-Elgin Metro Area / McHenry County / Johnsburg / Zip Codes
Johnsburg, IL has a humid continental climate characterized by hot summers and cold winters. The average high temperatures in the summer can reach up to 90°F while the average low temperature in winter rarely falls below 0°F. Precipitation is fairly evenly distributed throughout the year and snowfall is common during winter months. Overall, the climate in Johnsburg is mild, with occasional extreme temperatures throughout the year.

Johnsburg, Illinois gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Johnsburg averages 40 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 Johnsburg. The US average is 205 sunny days.

Johnsburg gets some kind of precipitation, on average, 118 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 82 degrees
Winter Low: the January low is 13
Rain: averages 36 inches of rain a year
Snow: averages 40 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Johnsburg is 6.8 (10=best), which means it is less comfortable than most places in Illinois.

9.1 Summer - 4.3 Winter
June, August and September are the most pleasant months in Johnsburg, while January and December are the least comfortable months.

  ClimateJohnsburg, IllinoisUnited States
    Unlock38.1 in.
  40.0 in.  Unlock
    Unlock106.2 days
  190 days  Unlock
  82.1°85.8°
    Unlock21.7°
  6.8  Unlock
    Unlock4.3
  751 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 Johnsburg with an average high temperature of 82.1°, which ranks it as one of the coolest places in Illinois. In Johnsburg, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Johnsburg are June, August and July.
In Johnsburg, there are 8.1 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.
January has the coldest nighttime temperatures for Johnsburg with an average of 13.4°. This is colder than most places in Illinois.
In Johnsburg, there are 136.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.
In Johnsburg, there are 11.2 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.
The humidity is usually comfortable in Johnsburg 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.
June is the wettest month in Johnsburg with 4.3 inches of rain, and the driest month is January with 1.6 inches. The wettest season is Autumn with 34% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.1 inches in Johnsburg means that it is one of the driest places in Illinois.
May is the rainiest month in Johnsburg with 12.2 days of rain, and February is the driest month with only 8.1 rainy days. There are 117.5 rainy days annually in Johnsburg, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.
An annual snowfall of 40.0 inches in Johnsburg means that it is one of the snowiest places in Illinois. January is the snowiest month in Johnsburg with 12.8 inches of snow, and 6 months of the year have significant snowfall.
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