May weather forecastCharleston International Airport, SC

Weather in May

May truly brings spring weather to Charleston International Airport, with steadily increasing temperatures and a more pleasing climate. Being a rainy season, the precipitation averages around 3.8" (97mm), accompanied by cooler temperatures at night. Longer days offer extended sunlight hours, and the UV index is at its peak. This period is characterized by a blend of heat and rainfall, painting a picture of blooming flora and rejuvenated fauna. The month’s end sets the stage for the impending summer.

Temperature

May in Charleston International Airport sees a temperature increase, moving from a refreshing 66.2°F (19°C) in April to a warm 75.2°F (24°C). The average low-temperature of 50°F (10°C) in May represents a significant drop from the daily high.

Rainfall

In Charleston International Airport, during May, the rain falls for 13 days and regularly aggregates up to 3.82" (97mm) 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

The average length of the day in May is 13h and 52min.
On the first day of May, sunrise is at 6:31 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 8:23 pm EDT.

Sunshine

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

UV index

In May, the average daily maximum UV index is 8. A UV Index reading of 8 to 10 represents a very high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 8 in May interprets into the following recommendations:
Always take precautions; unprotected eyes and skin can be damaged rapidly. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.