Hillsboro, IL Climate


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United States / Illinois / No Metro Area / Montgomery County / Hillsboro / Zip Codes
Hillsboro, IL has a temperate climate that is typical of the Midwest United States. In the summer months, temperatures rise into the 80s and occasionally into the 90s with high humidity levels, while in the winter temperatures typically range between the mid-30s and mid-40s with occasional snowfall. The area also experiences rainfall throughout the year, which helps keep its lush landscape green and vibrant. Overall, Hillsboro has a pleasant climate that makes it a great place to live or visit.

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

Hillsboro averages 15 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Hillsboro. The US average is 205 sunny days.

Hillsboro gets some kind of precipitation, on average, 99 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 87 degrees
Winter Low: the January low is 20
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year


Bestplaces Comfort Index

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

8 Summer - 5.4 Winter
September, May and June are the most pleasant months in Hillsboro, while January and December are the least comfortable months.

  ClimateHillsboro, IllinoisUnited States
  39.9 in.38.1 in.
  15.3 in.27.8 in.
  99.0 days106.2 days
  202 days205 days
  87.4°85.8°
  19.8°21.7°
  7.27
  4.24.3
  633 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 Hillsboro with an average high temperature of 87.4°, which ranks it as warmer than most places in Illinois. In Hillsboro, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hillsboro are September, May and June.
In Hillsboro, there are 28.6 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.
January has the coldest nighttime temperatures for Hillsboro with an average of 19.8°. This is warmer than most places in Illinois.
In Hillsboro, there are 108.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.
In Hillsboro, there are 4.3 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 Hillsboro 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 Hillsboro.
May is the wettest month in Hillsboro with 4.8 inches of rain, and the driest month is February with 2.1 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 39.9 inches in Hillsboro means that it is wetter than most places in Illinois.
May is the rainiest month in Hillsboro with 10.7 days of rain, and September is the driest month with only 6.4 rainy days. There are 99.0 rainy days annually in Hillsboro, 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 Spring with only a 23% chance of a rainy day.
An annual snowfall of 15.3 inches in Hillsboro means that it is less snowy than most places in Illinois. January is the snowiest month in Hillsboro with 5.3 inches of snow, and 4 months of the year have significant snowfall.
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