weather in hilton head in january
Weather in Hilton Head Island in January. The average maximum daytime temperature in Hilton Head Island in January is a comfortable 14Â°C (57Â°F). There are usually 6 hours of bright sunshine each day, which represents 55% of the 10 hours of daylight. The average sea temperature in and around Hilton Head Island in January is 17Â°C (63Â°F).