Contents
- Weather in June
- Frequently asked questions
- Average temperature in June
- Average pressure in June
- Average wind speed in June
- Average humidity in June
- Average rainfall in June
- Average rainfall days in June
- Average snowfall in June
- Average snowfall days in June
- Average daylight in June
- Average sunshine in June
- Average sunshine days in June
- Average UV index in June
- Average cloud cover in June
- Average visibility in June
Weather in June
Temperature
In June, the meteorological conditions subtly change with the average high-temperature edging from a pleasant 72.9°F (22.7°C) in May to a warm 81.1°F (27.3°C). Nightly temperatures in Sullivan drop to an average low of 64.2°F (17.9°C) in June.Heat index
The heat index value for June is evaluated at a tropical 86°F (30°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.The standards for the heat index are set for locations in shade and under light breezes. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Humidity
In June, the average relative humidity in Sullivan is 79%.Rainfall
The month with the most rainfall is June, when the rain falls for 13.9 days and typically aggregates up to 1.85" (47mm) of precipitation.Snowfall
May through October are months without snowfall in Sullivan, Illinois.Daylight
The month with the longest days in Sullivan, Illinois, is June, with an average of 14h and 54min of daylight.On the first day of the month, sunrise is at 5:28 am and sunset at 8:16 pm. On the last day of June, in Sullivan, sunrise is at 5:30 am and sunset at 8:26 pm CDT.
Sunshine
With an average of 10.4h of sunshine, June has the most sunshine of the year in Sullivan.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 6 in June, converts into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are June temperatures in Sullivan?
What is the average humidity in June in Sullivan?
What is the wettest month in Sullivan?
How many days does it rain in June in Sullivan?
When it does not snow in Sullivan?
When are the longest days in Sullivan?
What is the average length of the day in June in Sullivan?
What time are sunrise and sunset in June in Sullivan?
What month has the most sunshine in Sullivan?
How many hours of sunshine does Sullivan have in June?
What are the months with the highest UV index in Sullivan?
How high is the UV index in June in Sullivan?
Average temperature in June
Sullivan, IL
- Average high temperature in June: 81.1°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (33.6°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 (21.6°F).
Average pressure in June
Sullivan, 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).
Average wind speed in June
Sullivan, IL
- Average wind speed in June: 7.5mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in June
Sullivan, IL
- Average humidity in June: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in June
Sullivan, IL
- Average rainfall in June: 1.85"
The wettest month (with the highest rainfall) is June (1.85").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in June
Sullivan, IL
- Average rainfall days in June: 13.9 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in June
Sullivan, IL
- Average snowfall in June: 0"
The month with the highest snowfall is January (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in June
Sullivan, 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, September and October (0 days).
Average daylight in June /
Average sunshine in June
Sullivan, 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 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in June
Sullivan, IL
- Average sunshine days in June: 12.5 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in June
Sullivan, IL
- Average UV index in June: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in June
Sullivan, IL
- Average cloud cover in June: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in June
Sullivan, 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).
Sullivan, Illinois, USA
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