Climate in Effingham County, IL

Effingham County is located in east central Illinois and has a humid continental climate, meaning there are hot summers and cold winters. The average high temperature during the summer months (June-August) is around 82 degrees Fahrenheit, while the winter months (December-February) have average lows of 24 degrees Fahrenheit. Precipitation is relatively consistent throughout the year, although rain tends to be more frequent in spring and fall than during other seasons. The county experiences an average of 55 days of precipitation annually, mostly in the form of rain.

Effingham County, Illinois gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 200 sunny days per year in Effingham County. The US average is 205 sunny days.

Effingham County gets some kind of precipitation, on average, 107 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.

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Weather Highlights

Summer High: the July high is around 87 degrees
Winter Low: the January low is 20
Rain: averages 43 inches of rain a year
Snow: averages 15 inches of snow a year

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BESTPLACES COMFORT INDEX

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

September, May and June are the most pleasant months in Effingham County, while January and December are the least comfortable months.

July is the hottest month for Effingham County with an average high temperature of 87.3°, which ranks it as warmer than most places in Illinois. In Effingham County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Effingham County are September, May and June.

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In Effingham County, there are 26.5 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

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January has the coldest nighttime temperatures for Effingham County with an average of 20.2°. This is warmer than most places in Illinois.

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In Effingham County, there are 106.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

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In Effingham County, there are 3.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

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The humidity can be uncomfortably heavy or close in Effingham County 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 Effingham County.

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May is the wettest month in Effingham County with 5.1 inches of rain, and the driest month is February with 2.5 inches. The wettest season is Summer with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 42.9 inches in Effingham County means that it is wetter than most places in Illinois.

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May is the rainiest month in Effingham County with 11.3 days of rain, and September is the driest month with only 6.8 rainy days. There are 107.4 rainy days annually in Effingham County, 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 Winter with only a 23% chance of a rainy day.

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An annual snowfall of 15.0 inches in Effingham County means that it is less snowy than most places in Illinois. January is the snowiest month in Effingham County with 5.0 inches of snow, and 4 months of the year have significant snowfall.

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