The highest day temperature in May 2025 was 93°F. The lowest night temperature was 67°F. The average values for day and night temperatures during May were 84.0°F и 74.6°F respectivly.

The average sea surface temperature in May 2025 for Kiawah Island was 78.8°F. The maximum and minimum values were 74.6°F and 82.2°F respectively.

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

Precipitation total in May for Kiawah Island is 1.0 in.

The average wind speed in May is 7.9 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 8.2 hours.