Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
Weather Guide
Hilton Head, South Carolina, United States Average Monthly Weather
Weather score55Good annual avg
Best months: May, September, June
Across the year, average daytime temperatures are around 24°C, sunshine averages 7.5h per day, and rainfall totals about 1291mm. Sea temperatures average 22°C across the year.
Annual weather
Annual averages
Temp
24°C
Rain
1291mm
Annual total
Sun
7.5h
Sea
22°C
Weather score
55
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 193mm, so showers are a real planning factor.
Bright
Sunshine averages 8h per day, so bright days are a strong part of the month.
Warm sea
Sea temperatures average 29°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
August31°C average high
August is one of Hilton Head's warmest months, with daytime heat above the yearly average.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
August193mm average rain
August is one of Hilton Head's wettest months, so rain is likely to be a major planning factor.
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
August8 hours average sun
August 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
August29°C average sea
August 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
August65 weather score
August scores above Hilton Head's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsMay to October
These months have the strongest weather score in the monthly averages.
