June weather forecast
North Charleston, SC

June brings the true onset of summer to North Charleston, South Carolina, with its warm and humid weather. The average temperature values hit their stride with the highest at 87.1°F (30.6°C) and the lowest at 73.4°F (23°C). June’s weather, although warmer than May, is still comparatively mild than the intense heat of July. Despite the heat, June holds the promise of long sun-filled days and increased daylight hours. Be prepared for the highest UV index of the year, and don’t leave home without sunscreen.

Temperature

North Charleston's transition into June sees a mild rise in the average high-temperature, edging from a moderately hot 80.8°F (27.1°C) in May to a hot 87.1°F (30.6°C). North Charleston observes an average nighttime temperature of 73.4°F (23°C) during June.

Heat index

June's heat index is estimated at a fiery hot 100.4°F (38°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In North Charleston, the average relative humidity in June is 75%.

Rainfall

In North Charleston, in June, it is raining for 17.3 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, there are 154.4 rainfall days, and 23.43" (595mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall.

Daylight

The month with the longest days is June, with an average of 14h and 18min of daylight.
On the first day of June in North Charleston, sunrise is at 6:12 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:32 pm EDT.

Sunshine

In June, the average sunshine is 10.8h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum UV index of 7 in June translates into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.