Zip 62427 (Flat Rock, IL) Climate

The climate in 62427 Flat Rock, IL is generally mild and temperate. During the summer months, temperatures are typically hot and humid, with average highs ranging from the mid-80s to the upper 90s (Fahrenheit). Winters can be cold but snowfall is light, averaging around 8 inches per year. The spring months can be wet with plenty of rain showers while autumn tends to have warm, sunny days that make it an ideal time for outdoor activities.

Flat Rock (zip 62427), Illinois gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Flat Rock (zip 62427) averages 12 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 Flat Rock (zip 62427). The US average is 205 sunny days.

Flat Rock (zip 62427) 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.

Weather Highlights

Summer High: the July high is around 88 degrees
Winter Low: the January low is 23
Rain: averages 45 inches of rain a year
Snow: averages 12 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 62427 zip code is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

7.8 Summer - 5.5 Winter

September, May and June are the most pleasant months in the 62427 zip code, while January and December are the least comfortable months.

Climate	Flat Rock, Illinois	United States
	Unlock	38.1 in.
	12.4 in.	Unlock
	Unlock	106.2 days
	202 days	Unlock
	87.8°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	447 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 the 62427 zip code with an average high temperature of 87.8°, which ranks it as warmer than most places in Illinois. In the 62427 zip code, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 62427 zip code are May, September and June.

In the 62427 zip code, there are 31.8 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

January has the coldest nighttime temperatures for the 62427 zip code with an average of 22.7°. This is one of the warmest places in Illinois.

In the 62427 zip code, there are 95.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In the 62427 zip code, there are 2.5 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 the 62427 zip code 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 the 62427 zip code.

May is the wettest month in the 62427 zip code with 5.5 inches of rain, and the driest month is February with 2.4 inches. The wettest season is Summer with 30% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 44.5 inches in the 62427 zip code means that it is one of the wettest places in Illinois.

May is the rainiest month in the 62427 zip code with 11.4 days of rain, and September is the driest month with only 6.7 rainy days. There are 107.4 rainy days annually in the 62427 zip code, 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 22% chance of a rainy day.

An annual snowfall of 12.4 inches in the 62427 zip code means that it is less snowy than most places in Illinois. December is the snowiest month in the 62427 zip code with 3.9 inches of snow, and 4 months of the year have significant snowfall.

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