Charleston
South Carolina, USA
Long-term weather forecast
Long-term weather forecast

June weather forecast and climate
Charleston, SC

Trees along both sides of a street in Charleston, South Carolina, in the twilight light
Trees along both sides of a street in Charleston, South Carolina, in the twilight light
The first month of the summer, Junio, is a hot month in Charleston, South Carolina, with temperature in the range of an average low of 69.6°F (20.9°C) and an average high of 88.3°F (31.3°C).

Temperature

In Junio, the average high-temperature is almost the same as in Mayo - a hot 88.3°F (31.3°C). The average low-temperature, in Charleston, is 69.6°F (20.9°C).

Heat index

The average heat index in Junio is evaluated at an extremely hot 104.2°F (40.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, differences in body mass, height, and shape, wind, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

In Charleston, the average relative humidity is 75.1%.

Rainfall

In Charleston, it is raining for 11.9 days, with typically 5.65" (143.5mm) of accumulated precipitation. In Charleston, South Carolina, during the entire year, the rain falls for 112.7 days and collects up to 51.03" (1296.1mm) of precipitation.

Snowfall

Enero, Marzo through Noviembre are months without snowfall in Charleston.

Ocean temperature

In Charleston, the average water temperature is 79.3°F (26.3°C).
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The month with the longest days in Charleston is Junio, with an average of 14.3h of daylight.

Sunshine

In Junio, the average sunshine in Charleston is 9.3h.

UV index

Junio through Agosto, with an average maximum UV index of 10, are months with the highest UV index in Charleston. A UV Index value of 8 to 10 symbolizes a very high threat to health from unsafe exposure to the UV radiation for average individuals.
Note: In Junio, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Protection against sun damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in Junio in Charleston?

The average high-temperature, in Junio, is 88.3°F (31.3°C), while the average low-temperature is 69.6°F (20.9°C). In Junio, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 104.2°F (40.1°C).

What is the average humidity in Junio in Charleston?

The average relative humidity in Junio in Charleston, South Carolina, is 75.1%.

How many days does it rain in Junio in Charleston?

In Junio, the rain falls for 11.9 days. Throughout Junio, 5.65" (143.5mm) of precipitation is accumulated.

When it does not snow in Charleston?

In Charleston, South Carolina, snow does not fall in Enero, Marzo through Noviembre.

What is the ocean temperature in Junio in Charleston?

In Charleston, the average seawater temperature in Junio is 79.3°F (26.3°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in Charleston?

Junio has the longest days of the year, with an average of 14.3h of daylight.

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

In Charleston, the average length of the day in Junio is 14.3h.

How many hours of sunshine does Charleston have in Junio?

The average sunshine in Junio in Charleston, South Carolina, is 9.3h.

When is the highest UV index in Charleston?

Junio through Agosto, with an average maximum UV index of 10, are months with the highest UV index in Charleston.

What is the UV index intensity in Junio in Charleston?

In Junio, the average daily maximum UV index in Charleston is 10. A UV Index estimate of 8 to 10 represents a very high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in June - Charleston, SC
  • Average high temperature in June: 88.4°F

The warmest month (with the highest average high temperature) is July (91.1°F).
The month with the lowest average high temperature is January (59°F).

  • Average low temperature in June: 69.6°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.5°F).

Average humidity in June - Charleston, SC
  • Average humidity in June: 75.1%

The month with the highest relative humidity is August (78.9%).
The month with the lowest relative humidity is February (67.4%).

Average rainfall in June - Charleston, SC
  • Average rainfall in June: 5.7"

The wettest month (with the highest rainfall) is August (7.2").
The driest month (with the lowest rainfall) is November (2.4").

Average rainfall days in June - Charleston, SC
  • Average rainfall days in June: 11.9 days

The month with the highest number of rainy days is August (13.2 days).
The month with the lowest number of rainy days is November (7 days).

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

The month with the highest snowfall is December (0.5").
Months with the lowest snowfall are January, March, April, May, June, July, August, September, October and November (0").

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

Months with the highest number of snowfall days are February and December (0.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average sea temperature in June - Charleston, SC
  • Average sea temperature in June: 79.3°F

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).

Average daylight in June / Average sunshine in June - Charleston, SC
  • Average daylight in June: 14.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in June: 9.3h

The month with most sunshine is May (Average sunshine: 9.5h).
The month with least sunshine is December (Average sunshine: 5.5h).

Average UV index in June - Charleston, SC
  • Average UV index in June: 10

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).