June weather forecast
Charleston International Airport, SC

June ushers in the advent of summer at Charleston, bringing with it warm temperatures and relatively high humidity. The daily temperatures are expected to fluctuate significantly, hovering between highs of 82°F (27.8°C) and cooler lows that dip to 59°F (15°C) in the late hours. June also experiences the longest daylight hours, with the sun beaming around midday. The increased UV index that accompanies the sunshine is a factor to consider while planning outdoor activities. Despite June being a rainy month, the rainfall does not undermine the overall sunny ambiance and allure of summer.

Temperature

June introduces a marginal temperature uplift, with average high-temperatures adjusting from May's warm 75.2°F (24°C) to a still moderately hot 82.4°F (28°C). Charleston International Airport anticipates a considerable cooling off from the daytime high to an average minimum temperature of 59°F (15°C) in June.

Rainfall

In Charleston International Airport, South Carolina, during June, the rain falls for 11 days and regularly aggregates up to 3.39" (86mm) of precipitation. In Charleston International Airport, during the entire year, the rain falls for 151 days and collects up to 41.93" (1065mm) of precipitation.

Daylight

June has the longest days of the year, with an average of 14h and 18min of daylight.
On the first day of June, 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

May through August, with an average of 8h of sunshine, are months with the most sunshine.

UV index

June through August, with an average maximum UV index of 9, are months with the highest UV index. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index of 9 during June translates into these guidelines:
Take special precautions, as unprotected skin can be damaged and can burn quickly. 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. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Reduce the risk of sunburn by avoiding prolonged exposure and using sunscreen of at least 30 SPF.