Hilton Head Island Weather: September
 |
Average Day Temperature: | 85.6°F |
|
Average Night Temperature: | 75.3°F |
|
Sea Water Temperature: | 85.1°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 11.9 - 12.8 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.3 in | |
| detailed information | ||
forecast
| Hilton Head Island |
Temperature
| Hilton Head Island |
Air Temperature in September, °F
The highest day temperature in September 2025 was 93°F. The lowest night temperature was 73°F. The average values for day and night temperatures during September were 85.1°F и 76.5°F respectivly.
Hilton Head Island Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Hilton Head Island was 83.2°F. The maximum and minimum values were 80.2°F and 85.0°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Hilton Head Island is 1.3 in.
The average wind speed in September is 7.5 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 7.4 hours.
Hilton Head Island on the Weather Map
| Chicago |  |
0 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston | |
+46 |
| Las Vegas |  |
+44 |
| Los Angeles | |
+56 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach | |
+80 |
| New York | |
+20 |
| San Diego | |
+58 |
| San Francisco | |
+48 |
| Sarasota | |
+64 |
| Tampa | |
+64 |
| Washington | |
+28 |
| 0300 |  |
54°F | NW 6 mph |
| 0600 | |
52°F | S 4 mph |
| 0900 | |
56°F | SW 7 mph |
| 1200 | |
54°F | SW 6 mph |
| 1500 | |
52°F | SE 8 mph |
| 1800 | |
52°F | SE 8 mph |
| 2100 |  |
52°F | SW 4 mph |
| 0000 | |
50°F | SE 6 mph |