Donnellson, IL Climate


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United States / Illinois / St. Louis Metro Area / Montgomery County / Donnellson / Zip Codes
Donnellson, IL has a humid continental climate with hot and humid summers and cold winters. The average annual temperature is around 54°F (12°C) with an average of over four inches of rain each month. Summers are typically hot and humid with temperatures reaching up to 94°F (34°C), while winter temperatures can dip to as low as 19°F (-7°C). Snowfall is common in the winter months, but varies from season to season.

Donnellson, Illinois gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Donnellson averages 14 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 194 sunny days per year in Donnellson. The US average is 205 sunny days.

Donnellson gets some kind of precipitation, on average, 94 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 88 degrees
Winter Low: the January low is 20
Rain: averages 41 inches of rain a year
Snow: averages 14 inches of snow a year

Bestplaces Comfort Index

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

7.9 Summer - 5.5 Winter
September, May and June are the most pleasant months in Donnellson, while January and December are the least comfortable months.

  ClimateDonnellson, IllinoisUnited States
    Unlock38.1 in.
  13.7 in.  Unlock
    Unlock106.2 days
  194 days  Unlock
  87.6°85.8°
    Unlock21.7°
  7.2  Unlock
    Unlock4.3
  614 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 Donnellson with an average high temperature of 87.6°, which ranks it as warmer than most places in Illinois. In Donnellson, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Donnellson are September, May and June.
In Donnellson, there are 29.9 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.
January has the coldest nighttime temperatures for Donnellson with an average of 20.4°. This is warmer than most places in Illinois.
In Donnellson, there are 105.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.
In Donnellson, there are 3.6 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 Donnellson 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 Donnellson.
May is the wettest month in Donnellson with 4.9 inches of rain, and the driest month is February with 2.2 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 40.5 inches in Donnellson means that it is wetter than most places in Illinois.
May is the rainiest month in Donnellson with 10.2 days of rain, and September is the driest month with only 6.1 rainy days. There are 94.4 rainy days annually in Donnellson, which is one of the least rainy places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 22% chance of a rainy day.
An annual snowfall of 13.7 inches in Donnellson means that it is less snowy than most places in Illinois. January is the snowiest month in Donnellson with 4.8 inches of snow, and 4 months of the year have significant snowfall.
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