June weather forecastJohns Island, SC
June
Weather in June
The first month of the summer, June, is a hot month in Johns Island, South Carolina, with an average temperature varying between 87.1°F (30.6°C) and 73.4°F (23°C).Temperature
In June, the average high-temperature marginally rises from a warm 80.8°F (27.1°C) in May to a tropical 87.1°F (30.6°C). In June, Johns Island experiences an average nighttime temperature of 73.4°F (23°C).Heat index
The average heat index in June is appraised at a very hot 100.4°F (38°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
In June, the average relative humidity is 75%.Rainfall
In June, in Johns Island, the rain falls for 17.3 days. Throughout June, 2.6" (66mm) of precipitation is accumulated. Throughout the year, in Johns Island, there are 154.4 rainfall days, and 23.43" (595mm) of precipitation is accumulated.Snowfall
In Johns Island, South Carolina, snow does not fall in March through November.Daylight
June has the longest days of the year in Johns Island, with an average of 14h and 18min of daylight.On the first day of the month, sunrise is at 6:12 am and sunset at 8:23 pm. On the last day of June, sunrise is at 6:15 am and sunset at 8:32 pm EDT.
Sunshine
The average sunshine in June is 10.8h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 7 in June translates into these instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Johns Island, SC
- Average high temperature in June: 87.1°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in June: 73.4°F
The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in June
Johns Island, SC
- 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).
Average wind speed in June
Johns Island, SC
- Average wind speed in June: 7mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in June
Johns Island, SC
- Average humidity in June: 75%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).
Average rainfall in June
Johns Island, SC
- Average rainfall in June: 2.6"
The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in June
Johns Island, SC
- Average rainfall days in June: 17.3 days
The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is November (6.9 days).
Average snowfall days in June
Johns Island, SC
- Average snowfall days in June: 0 days
The month with the highest number of snowfall days is December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in June /
Average sunshine in June
Johns Island, SC
- Average daylight in June: 14h and 18min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in June
Johns Island, SC
- Average sunshine days in June: 9.7 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (6.1 days).
Average UV index in June
Johns Island, SC
- 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).
Average cloud cover in June
Johns Island, SC
- Average cloud cover in June: 26
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in June
Johns Island, SC
- 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).
