Weather in Charleston County, United States in May

So you're interested in going to Charleston County, United States in May

May is a hot and slightly rainy time for sunbathing in Charleston County. May is a good month for swimming in Charleston County with warm sea temperatures. Consider visiting Charleston County in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Temperature in Charleston County in May

The average maximum temperature in Charleston County in May is 28°. The average maximum temperature is 24° in the previous month and 31° in the next month.

The average temperature in Charleston County in May is 23°. The average temperature ranges is 19° in the previous month and 27° in the next month.

The average minimum temperature in Charleston County in May is 19°. The minimum temperature is 14° in the previous month and 23° in the next month.

Sunshine in Charleston County in May

The average day light hours per day in Charleston County in May are 13.8 and there are 7.8 hours of sunshine per day on average during May making it a quite sunny month with some cloud cover.

The ultraviolet index in Charleston County in May is typically 10.6 during May. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Charleston County in May

The average sea water temperature in Charleston County in May is 21.9° which is comfortable for swimming though some may prefer warmer water.

Rainfall in Charleston County in May

The average total rainfall in Charleston County in May is 53.5cm and on average there are 7.5 rainy days in May making it a slightly wet time to visit the beach.

Humidity in Charleston County in May

The maximum dew point (an indicator of humidity) in Charleston County in May is 20° which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 17° in the previous month and 24° in the next month.

The average maximum relative humidity in Charleston County in May is typically 93.9%. The maximum relative humidity is 94.9% in the previous month and 93.7% in the next month.

The average relative humidity in Charleston County in May is typically 75%. The average relative humidity is 73.8% in the previous month and 75.7% in the next month.

Wind Speed in Charleston County in May

The average maximum wind speed in Charleston County in May is typically 25kmh. The average maximum wind speed is 27kmh in the previous month and 24kmh in the next month.

The average wind speed in Charleston County in May is typically 11kmh. The average wind speed is 12kmh in the previous month and 9kmh in the next month.

The average wind direction in Charleston County in May is from the South.

Monthly Averages

Suggested Beaches in May

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