The highest day temperature in September 2024 was 88°F. The lowest night temperature was 71°F. The average values for day and night temperatures during September were 83.5°F и 78.6°F respectivly.

The average sea surface temperature in September 2024 for Hilton Head Island was 83.6°F. The maximum and minimum values were 80.2°F and 89.0°F respectively.

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

Precipitation total in September for Hilton Head Island is 1.5 in.

The average wind speed in September is 7.1 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 Hilton Head Island in September is 7.1 hours.