The highest day temperature in September 2026 was 95°F. The lowest night temperature was 69°F. The average values for day and night temperatures during September were 85.4°F и 82.8°F respectivly.

The average sea surface temperature in September 2026 for Wilmington Island was 87.1°F. The maximum and minimum values were 80.8°F and 90.2°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Wilmington Island is 1.2 in.

The average wind speed in September is 8.1 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 Wilmington Island in September is 7.1 hours.