The highest day temperature in May 2023 was 92°F. The lowest night temperature was 56°F. The average values for day and night temperatures during May were 82.7°F и 68.6°F respectivly.

The average sea surface temperature in May 2023 for St. Simons Island was 78.0°F. The maximum and minimum values were 73.2°F and 81.8°F respectively.

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

Precipitation total in May for St. Simons Island is 1.0 in.

The average wind speed in May is 5.8 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 St. Simons Island in May is 8.5 hours.