The highest day temperature in May 2026 was 87°F. The lowest night temperature was 53°F. The average values for day and night temperatures during May were 78.3°F и 71.7°F respectivly.

The average sea surface temperature in May 2026 for Kiawah Island was 76.8°F. The maximum and minimum values were 70.4°F and 85.6°F respectively.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Kiawah Island is 1.0 in.

The average wind speed in May is 8.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Kiawah Island in May is 8.7 hours.