Zip 62037 (Grafton, IL) Climate

Grafton, IL has a humid continental climate with four distinct seasons. Summers in the area are typically hot and humid, with temperatures ranging from an average high of around 84°F (29°C) down to an average low of about 60°F (16°C). Winters in Grafton are cold and snowy, with temperatures ranging from an average high of just above freezing to an average low of around 15°F (-9°C). The area receives an average of 37 inches (94 cm) of precipitation per year, spread evenly over all four seasons.

Grafton (zip 62037), Illinois gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Grafton (zip 62037) averages 14 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 Grafton (zip 62037). The US average is 205 sunny days.

Grafton (zip 62037) gets some kind of precipitation, on average, 96 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 21
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 the 62037 zip code 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 the 62037 zip code, while January and December are the least comfortable months.

Climate	Grafton, Illinois	United States
	Unlock	38.1 in.
	13.7 in.	Unlock
	Unlock	106.2 days
	202 days	Unlock
	87.7°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	733 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 62037 zip code with an average high temperature of 87.7°, which ranks it as warmer than most places in Illinois. In the 62037 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 62037 zip code are September, May and June.

In the 62037 zip code, there are 30.0 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 62037 zip code with an average of 20.5°. This is warmer than most places in Illinois.

In the 62037 zip code, there are 104.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In the 62037 zip code, there are 2.8 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 62037 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 62037 zip code.

May is the wettest month in the 62037 zip code with 4.6 inches of rain, and the driest month is January with 2.3 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 40.7 inches in the 62037 zip code means that it is wetter than most places in Illinois.

May is the rainiest month in the 62037 zip code with 10.2 days of rain, and January is the driest month with only 6.5 rainy days. There are 96.0 rainy days annually in the 62037 zip code, 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 21% chance of a rainy day.

An annual snowfall of 13.7 inches in the 62037 zip code means that it is less snowy than most places in Illinois. January is the snowiest month in the 62037 zip code with 4.3 inches of snow, and 5 months of the year have significant snowfall.

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