Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
Hilton Head, South Carolina, United States in September
Weather score74Very good
Very good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 7.1h per day, enough for a balanced month. Rainfall averages 134mm, so some wet days are possible.
September weather
Monthly averages
Temp
29°C
Rain
134mm
Sun
7.1h
Sea
28°C
Weather score
74
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 134mm, so some wet days are possible.
Some sun
Sunshine averages 7.1h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Hilton Head, South Carolina, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
September134mm average rain
September sits near Hilton Head's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to February, April to May, and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.1 hours average sun
September sits close to Hilton Head's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September28°C average sea
September is one of Hilton Head's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to September
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
Weather score
September74 weather score
September is one of Hilton Head's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsMay to October
These months have the strongest weather score in the monthly averages.
