June weather forecast
Cahokia, IL

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Weather in June

The first month of the summer, June, is also a moderately hot month in Cahokia, Illinois, with an average temperature varying between 66.9°F (19.4°C) and 83.8°F (28.8°C).

Temperature

A shift in the average high-temperature is noticeable in June, changing from 74.8°F (23.8°C) in May to a still moderately hot 83.8°F (28.8°C). During the month of June, an average temperature of 66.9°F (19.4°C) is noted during the nights in Cahokia, Illinois.

Heat index

For June, the heat index is calculated to be a hot 93.2°F (34°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.

Humidity

The average relative humidity in June in Cahokia is 77%.

Rainfall

In June, in Cahokia, Illinois, the rain falls for 15.9 days. Throughout June, 4.02" (102mm) of precipitation is accumulated. Throughout the year, in Cahokia, there are 152.2 rainfall days, and 36.46" (926mm) of precipitation is accumulated.

Snowfall

In Cahokia, Illinois, snow does not fall in April through October.

Daylight

With an average of 14h and 48min of daylight, June has the longest days of the year.
On the first day of the month, sunrise is at 5:37 am and sunset at 8:19 pm. On the last day of June, sunrise is at 5:40 am and sunset at 8:29 pm CDT.

Sunshine

June and July, with an average of 10.4h of sunshine, are months with the most sunshine in Cahokia.

UV index

The months with the highest UV index in Cahokia are May through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 6 during June translates into the following directions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is June in Cahokia?

An average high-temperature, in June, in Cahokia, is 83.8°F (28.8°C) and the average low-temperature is 66.9°F (19.4°C). In June, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is calculated to be 93.2°F (34°C).

What is the average humidity in June in Cahokia?

In Cahokia, the average relative humidity in June is 77%.

How many days does it rain in June in Cahokia?

In Cahokia, during June, the rain falls for 15.9 days and regularly aggregates up to 4.02" (102mm) of precipitation.

When it does not snow in Cahokia?

April through October are months without snowfall in Cahokia, Illinois.

When are the longest days in Cahokia?

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

How many hours of daylight does Cahokia have in June?

In Cahokia, the average day length in June is 14h and 49min.

When is the sunrise / sunset in June in Cahokia?

On the first day of June in Cahokia, Illinois, sunrise is at 5:37 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:29 pm CDT.

What is the month with the most sunshine in Cahokia?

June and July, with an average of 10.4h of sunshine, are months with the most sunshine in Cahokia.

How long on average sun shines in June in Cahokia?

In June, the average sunshine duration in Cahokia, Illinois, is 10.4h.

What are the months with the highest UV index in Cahokia?

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

What is the UV index reading in June in Cahokia?

In June, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from 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
Cahokia, IL

Average temperature in June - Cahokia, IL
  • Average high temperature in June: 83.8°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in June: 66.9°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 (24.6°F).

Average pressure in June
Cahokia, IL

Average pressure in June - Cahokia, IL
  • Average pressure in June: 29.92"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in June
Cahokia, IL

Average wind speed in June - Cahokia, IL
  • Average wind speed in June: 6.5mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).

Average humidity in June
Cahokia, IL

Average humidity in June - Cahokia, IL
  • Average humidity in June: 77%

The months with the highest relative humidity are May and July (78%).
The month with the lowest relative humidity is October (71%).

Average rainfall in June
Cahokia, IL

Average rainfall in June - Cahokia, IL
  • Average rainfall in June: 4.02"

The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is February (2.01").

Average rainfall days in June
Cahokia, IL

Average rainfall days in June - Cahokia, IL
  • Average rainfall days in June: 15.9 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.7 days).

Average snowfall in June
Cahokia, IL

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

The month with the highest snowfall is February (2.44").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in June
Cahokia, IL

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

The month with the highest number of snowfall days is January (6.4 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
Cahokia, IL

Average daylight in June / Average sunshine in June - Cahokia, 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 30min).

  • Average sunshine in June: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in June
Cahokia, IL

Average sunshine days in June - Cahokia, IL
  • Average sunshine days in June: 11.3 days

The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in June
Cahokia, IL

Average UV index in June - Cahokia, 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
Cahokia, IL

Average cloud cover in June - Cahokia, IL
  • Average cloud cover in June: 29

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in June
Cahokia, IL

Average visibility in June - Cahokia, 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).

Cahokia, Illinois, USA

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