June weather forecast
Sullivan's Island, SC

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Weather in June

The first month of the summer, June, is still a warm month in Sullivan's Island, South Carolina, with an average temperature ranging between min 75.4°F (24.1°C) and max 84.6°F (29.2°C).

Temperature

The arrival of June witnesses a small shift in the average high-temperature, moving from a moderately hot 78.1°F (25.6°C) in May to a still warm 84.6°F (29.2°C). In Sullivan's Island, the average nighttime temperature during June is a still moderately hot 75.4°F (24.1°C).

Heat index

In June, the heat index is appraised at a hot 93.2°F (34°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

In June, the average relative humidity in Sullivan's Island, South Carolina, is 76%.

Rainfall

In Sullivan's Island, in June, during 21 rainfall days, 4.72" (120mm) of precipitation is typically accumulated. Throughout the year, there are 182 rainfall days, and 45.55" (1157mm) of precipitation is accumulated.

Snowfall

In Sullivan's Island, snow does not fall in March through December.

Daylight

June has the longest days of the year in Sullivan's Island, with an average of 14h and 18min of daylight.
On the first day of the month, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of June, in Sullivan's Island, sunrise is at 6:14 am and sunset at 8:31 pm EDT.

Sunshine

The average sunshine in June is 10.9h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In June, the UV index of 7 transforms into the following advice:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

How hot is it in Sullivan's Island in June?

In Sullivan's Island, in June, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 75.4°F (24.1°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in June is appraised at 93.2°F (34°C).

What is the average humidity in June in Sullivan's Island?

The average relative humidity in June is 76%.

How many days does it rain in June in Sullivan's Island?

In Sullivan's Island, South Carolina, in June, during 21 rainfall days, 4.72" (120mm) of precipitation is typically accumulated.

When it does not snow in Sullivan's Island?

March through December are months without snowfall in Sullivan's Island.

When are the longest days in Sullivan's Island?

With an average of 14h and 18min of daylight, June has the longest days of the year in Sullivan's Island, South Carolina.

What is the average length of the day in June in Sullivan's Island?

In June, the average day length in Sullivan's Island is 14h and 17min.

When are sunrise and sunset in June in Sullivan's Island?

On the first day of June in Sullivan's Island, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 8:31 pm EDT.

How many hours of sunshine does Sullivan's Island have in June?

In Sullivan's Island, the average sunshine duration in June is 10.9h.

When is the highest UV index in Sullivan's Island?

May through August, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in June in Sullivan's Island?

The average daily maximum UV index in June in Sullivan's Island, South Carolina, is 7. A UV Index estimate of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Sullivan's Island, SC

Average temperature in June - Sullivan
  • Average high temperature in June: 84.6°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (57°F).

  • Average low temperature in June: 75.4°F

The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).

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Average pressure in June
Sullivan's Island, SC

Average pressure in June - Sullivan
  • Average pressure in June: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed in June
Sullivan's Island, SC

Average wind speed in June - Sullivan
  • Average wind speed in June: 8.9mph

The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).

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Average humidity in June
Sullivan's Island, SC

Average humidity in June - Sullivan
  • Average humidity in June: 76%

The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January and March (73%).

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Average rainfall in June
Sullivan's Island, SC

Average rainfall in June - Sullivan
  • Average rainfall in June: 4.72"

The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is January (1.42").

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Average rainfall days in June
Sullivan's Island, SC

Average rainfall days in June - Sullivan
  • Average rainfall days in June: 21 days

The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall days in June
Sullivan's Island, SC

Average snowfall days in June - Sullivan
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in June /
Average sunshine in June
Sullivan's Island, SC

Average daylight in June / Average sunshine in June - Sullivan
  • Average daylight in June: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in June: 10h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

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Average sunshine days in June
Sullivan's Island, SC

Average sunshine days in June - Sullivan
  • Average sunshine days in June: 6.5 days

The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (2.8 days).

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Average UV index in June
Sullivan's Island, SC

Average UV index in June - Sullivan
  • Average UV index in June: 7

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

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Average cloud cover in June
Sullivan's Island, SC

Average cloud cover in June - Sullivan
  • Average cloud cover in June: 25

The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).

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Average visibility in June
Sullivan's Island, SC

Average visibility in June - Sullivan
  • 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).

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Sullivan's Island, South Carolina, USA

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