The highest day temperature in June 2025 was 96°F. The lowest night temperature was 71°F. The average values for day and night temperatures during June were 90.3°F и 80.1°F respectivly.

The average sea surface temperature in June 2025 for St. Simons Island was 86.0°F. The maximum and minimum values were 83.6°F and 89.2°F respectively.

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

Precipitation total in June for St. Simons Island is 1.3 in. It makes june one of the most rainy months of the year.

The average wind speed in June is 6.2 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 St. Simons Island in June is 7.7 hours.