June weather forecast
Charleston, IL

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Weather in June

The first month of the summer, June, is a moderately hot month in Charleston, Illinois, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 81.1°F (27.3°C).

Temperature

The beginning of June marks a minor shift in the average high-temperature, moving from May's pleasant 73°F (22.8°C) to a moderately hot 81.1°F (27.3°C). During the month of June, the temperature in Charleston, Illinois, falls to an average of 64.2°F (17.9°C).

Heat index

The heat index for June is evaluated at a hot 86°F (30°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

In June, the average relative humidity is 79%.

Rainfall

In June, the rain falls for 15.6 days. Throughout June, 2.76" (70mm) of precipitation is accumulated. In Charleston, during the entire year, the rain falls for 148 days and collects up to 25.63" (651mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

With an average of 14h and 54min of daylight, June has the longest days of the year in Charleston.
On the first day of the month, sunrise is at 5:27 am and sunset at 8:14 pm. On the last day of June, sunrise is at 5:29 am and sunset at 8:24 pm CDT.

Sunshine

With an average of 10.3h of sunshine, June has the most sunshine of the year.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Charleston. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum daily UV index of 6 during June morphs into the following directions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
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Frequently asked questions

What is the usual temperature for Charleston in June?

Charleston in June has an average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.2°F (17.9°C). In June, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is evaluated at 86°F (30°C).

What is the average humidity in June in Charleston?

In June, the average relative humidity in Charleston is 79%.

How much does it rain in Charleston in June?

In Charleston, during June, the rain falls for 15.6 days and regularly aggregates up to 2.76" (70mm) of precipitation.

When it does not snow in Charleston?

May through September are months without snowfall.

When are the longest days in Charleston?

The month with the longest days in Charleston, Illinois, is June, with an average of 14h and 54min of daylight.

What is the average length of the day in June in Charleston?

In June, the average day length is 14h and 55min.

What time are sunrise and sunset in June in Charleston?

In June, on the first day of the month, sunrise is at 5:27 am and sunset at 8:14 pm. On the last day of the month, in Charleston, Illinois, sunrise is at 5:29 am and sunset at 8:24 pm CDT.

What month has the most sunshine in Charleston?

June has the most sunshine of the year in Charleston, with an average of 10.3h of sunshine.

How long on average sun shines in June in Charleston?

In June, the average sunshine duration in Charleston is 10.3h.

When is the highest UV index in Charleston?

The months with the highest UV index in Charleston, Illinois, are June through August, with an average maximum UV index of 6.

What is the UV index reading in June in Charleston?

In Charleston, the average daily maximum UV index in June is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
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
Charleston, IL

Average temperature in June - Charleston, IL
  • Average high temperature in June: 81.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in June: 64.2°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in June
Charleston, IL

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in June
Charleston, IL

Average wind speed in June - Charleston, IL
  • Average wind speed in June: 7.4mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

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Average humidity in June
Charleston, IL

Average humidity in June - Charleston, IL
  • Average humidity in June: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in June
Charleston, IL

Average rainfall in June - Charleston, IL
  • Average rainfall in June: 2.76"

The wettest month (with the highest rainfall) is April (3.31").
The driest month (with the least rainfall) is February (1.3").

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Average rainfall days in June
Charleston, IL

Average rainfall days in June - Charleston, IL
  • Average rainfall days in June: 15.6 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (7.8 days).

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Average snowfall in June
Charleston, IL

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

The month with the highest snowfall is December (2.13").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in June
Charleston, IL

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

The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in June: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in June
Charleston, IL

Average sunshine days in June - Charleston, IL
  • Average sunshine days in June: 11.5 days

The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is July (10.6 days).

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Average UV index in June
Charleston, IL

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

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in June
Charleston, IL

Average cloud cover in June - Charleston, IL
  • Average cloud cover in June: 31

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 31).

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Average visibility in June
Charleston, IL

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

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).

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Charleston, Illinois, USA

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