June weather forecast
Chester, IL

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Weather in June

The first month of the summer, June, is still a warm month in Chester, Illinois, with an average temperature ranging between max 85.1°F (29.5°C) and min 66.6°F (19.2°C).

Temperature

June indicates a change in the average high-temperature, moving up from 75.7°F (24.3°C) in May to a still moderately hot 85.1°F (29.5°C). In the month of June, an average of 66.6°F (19.2°C) marks the low-temperature.

Heat index

For June, the heat index is appraised at a very hot 95°F (35°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Heat index determinations are made taking into account the shade and light air movements. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is found by incorporating humidity levels into the air temperature measurement. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In Chester, the average relative humidity in June is 76%.

Rainfall

In Chester, in June, it is raining for 15.7 days, with typically 3.27" (83mm) of accumulated precipitation. In Chester, during the entire year, the rain falls for 156.4 days and collects up to 34.25" (870mm) of precipitation.

Snowfall

In Chester, snow does not fall in May through September.

Daylight

June has the longest days of the year, with an average of 14h and 48min of daylight.
On the first day of June, sunrise is at 5:38 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:25 pm CDT.

Sunshine

The months with the most sunshine are June and July, with an average of 10.5h of sunshine.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 6 in June interprets into the following advice:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Updated: Jun 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in June?

In Chester, in June, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 66.6°F (19.2°C). In June, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is appraised at 95°F (35°C).

What is the average humidity in June?

In June, the average relative humidity is 76%.

How many days does it rain in June?

In Chester, in June, during 15.7 rainfall days, 3.27" (83mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

When are the longest days?

The month with the longest days is June, with an average of 14h and 48min of daylight.

How many hours of daylight does Chester have in June?

In June, the average day length is 14h and 45min.

What time are sunrise and sunset in June?

On the first day of June, sunrise is at 5:38 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:25 pm CDT.

What is the month with the most sunshine?

The months with the most sunshine are June and July, with an average of 10.5h of sunshine.

How many hours of sunshine does Chester have in June?

In June, the average sunshine duration is 10.5h.

What are the months with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

How high is the UV index in June?

The average daily maximum UV index in June is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Chester, IL

Average temperature in June - Chester, IL
  • Average high temperature in June: 85.1°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in June: 66.6°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in June
Chester, IL

Average pressure in June - Chester, IL
  • Average pressure in June: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in June
Chester, IL

Average wind speed in June - Chester, IL
  • Average wind speed in June: 6.4mph

The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in June
Chester, IL

Average humidity in June - Chester, IL
  • Average humidity in June: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in June
Chester, IL

Average rainfall in June - Chester, IL
  • Average rainfall in June: 3.27"

The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.97").

Average rainfall days in June
Chester, IL

Average rainfall days in June - Chester, IL
  • Average rainfall days in June: 15.7 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (7.9 days).

Average snowfall in June
Chester, IL

Average snowfall in June - Chester, IL
  • Average snowfall in June: 0"

The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in June
Chester, IL

Average snowfall days in June - Chester, IL
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in June /
Average sunshine in June
Chester, IL

Average daylight in June / Average sunshine in June - Chester, IL
  • Average daylight in June: 14h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in June: 10h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in June
Chester, IL

Average sunshine days in June - Chester, IL
  • Average sunshine days in June: 12 days

The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.8 days).

Average UV index in June
Chester, IL

Average UV index in June - Chester, IL
  • Average UV index in June: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in June
Chester, IL

Average cloud cover in June - Chester, IL
  • Average cloud cover in June: 27

The months with the most cloud cover are January and February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in June
Chester, IL

Average visibility in June - Chester, IL
  • Average visibility in June: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Chester, Illinois, USA

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