Mill Creek, IL Climate


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United States / Illinois / No Metro Area / Union County / Mill Creek / Zip Codes
Mill Creek, IL has a humid continental climate, characterized by warm to hot summers and cold winter months. Average high temperatures in the summer months range from the upper 70s to the mid-80s Fahrenheit, while average low temperatures in the winter months range from the upper teens to the lower 20s Fahrenheit. Precipitation is fairly evenly spread throughout the year, with light snowfall during the winter months. The climate can be quite extreme at times, with scorching heat waves in summer and bitterly cold temperatures in winter.

Bestplaces Comfort Index

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

7.2 Summer - 5.8 Winter
September, May and October are the most pleasant months in Mill Creek, while January and December are the least comfortable months.

  ClimateMill Creek, IllinoisUnited States
  49.3 in.38.1 in.
  10.2 in.27.8 in.
  105.2 days106.2 days
  219 days205 days
  88.7°85.8°
  24.7°21.7°
  7.27
  4.34.3
  377 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 Mill Creek with an average high temperature of 88.7°, which ranks it as one of the hottest places in Illinois. In Mill Creek, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mill Creek are May, September and October.
In Mill Creek, there are 36.0 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 Mill Creek with an average of 24.7°. This is one of the warmest places in Illinois.
In Mill Creek, there are 86.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.
In Mill Creek, there are 1.1 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 Mill Creek 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 Mill Creek.
May is the wettest month in Mill Creek with 5.3 inches of rain, and the driest month is August with 2.9 inches. The wettest season is Summer with 30% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 49.3 inches in Mill Creek means that it is one of the wettest places in Illinois.
May is the rainiest month in Mill Creek with 10.5 days of rain, and August is the driest month with only 6.0 rainy days. There are 105.2 rainy days annually in Mill Creek, which is about average compared to other places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Autumn with only a 22% chance of a rainy day.
An annual snowfall of 10.2 inches in Mill Creek means that it is one of the least snowy places in Illinois. February is the snowiest month in Mill Creek with 3.9 inches of snow, and 4 months of the year have significant snowfall.
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