Henderson, IL Climate


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United States / Illinois / Galesburg Metro Area / Knox County / Henderson / Zip Codes
Henderson, IL enjoys a humid continental climate with hot, humid summers and cold, snowy winters. Summer temperatures average in the high 80s and low 90s, while winter temperatures sit in the mid-teens to low 20s. The town receives an average of 39 inches of precipitation throughout the year with April being the wettest month. Snowfall is common during the winter months, usually ranging from 12-15 inches throughout the season.

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

Henderson averages 25 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 193 sunny days per year in Henderson. The US average is 205 sunny days.

Henderson gets some kind of precipitation, on average, 110 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 84 degrees
Winter Low: the January low is 14
Rain: averages 38 inches of rain a year
Snow: averages 25 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Henderson is 7.0 (10=best), which means it is about average compared to other places in Illinois.

8.8 Summer - 4.7 Winter
June, September and August are the most pleasant months in Henderson, while January and December are the least comfortable months.

  ClimateHenderson, IllinoisUnited States
  38.3 in.38.1 in.
  24.6 in.27.8 in.
  109.5 days106.2 days
  193 days205 days
  84.0°85.8°
  13.6°21.7°
  77
  3.74.3
  817 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 Henderson with an average high temperature of 84.0°, which ranks it as cooler than most places in Illinois. In Henderson, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Henderson are September, June and August.
In Henderson, there are 10.3 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.
January has the coldest nighttime temperatures for Henderson with an average of 13.6°. This is colder than most places in Illinois.
In Henderson, there are 133.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.
In Henderson, there are 10.1 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.
The humidity is usually comfortable in Henderson 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 Henderson with 4.4 inches of rain, and the driest month is January with 1.6 inches. The wettest season is Autumn with 33% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 38.3 inches in Henderson means that it is drier than most places in Illinois.
May is the rainiest month in Henderson with 11.7 days of rain, and February is the driest month with only 7.2 rainy days. There are 109.5 rainy days annually in Henderson, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 22% chance of a rainy day.
An annual snowfall of 24.6 inches in Henderson means that it is snowier than most places in Illinois. January is the snowiest month in Henderson with 7.4 inches of snow, and 5 months of the year have significant snowfall.
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