Zip 62002 (Alton, IL) Climate

Alton, IL is located in the Midwestern United States and has a humid continental climate. It enjoys four distinct seasons with hot and humid summers and cold winters with occasional snowfall. Spring and autumn are generally mild, but can be quite unpredictable. Winters typically last from late November through the end of February, while summers run from early June to mid-September. Average temperatures range from around 29°F in January to 81°F in July and August. Precipitation is abundant throughout the year, averaging just over 40 inches annually, most of which falls between April and October.

Alton (zip 62002), Illinois gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Alton (zip 62002) averages 16 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 Alton (zip 62002). The US average is 205 sunny days.

Alton (zip 62002) gets some kind of precipitation, on average, 105 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 89 degrees
Winter Low: the January low is 23
Rain: averages 42 inches of rain a year
Snow: averages 16 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 62002 zip code is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

7.3 Summer - 5.6 Winter

September, May and October are the most pleasant months in the 62002 zip code, while January and December are the least comfortable months.

Climate	Alton, Illinois	United States
	Unlock	38.1 in.
	15.5 in.	Unlock
	Unlock	106.2 days
	202 days	Unlock
	88.8°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	522 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 62002 zip code with an average high temperature of 88.8°, which ranks it as one of the hottest places in Illinois. In the 62002 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 62002 zip code are May, September and June.

In the 62002 zip code, there are 37.2 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

January has the coldest nighttime temperatures for the 62002 zip code with an average of 22.7°. This is one of the warmest places in Illinois.

In the 62002 zip code, there are 87.9 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In the 62002 zip code, there are 1.7 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

The humidity can be uncomfortably heavy or close in the 62002 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 62002 zip code.

May is the wettest month in the 62002 zip code with 5.0 inches of rain, and the driest month is January with 2.4 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 41.8 inches in the 62002 zip code means that it is wetter than most places in Illinois.

May is the rainiest month in the 62002 zip code with 11.3 days of rain, and September is the driest month with only 7.0 rainy days. There are 104.5 rainy days annually in the 62002 zip code, which is less rainy than most 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 15.5 inches in the 62002 zip code means that it is less snowy than most places in Illinois. January is the snowiest month in the 62002 zip code with 4.8 inches of snow, and 5 months of the year have significant snowfall.

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